Open source game developers (J)

J

Developed game: TIC-80

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J Williams

Developed game: FlightGear

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j-jorge

Developed games: COCOS2D-X, Plee the Bear

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J-M Le Peuvedic

Developed game: GL-117

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j-p-e-g

Developed game: NLarn

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j-palomo

Developed games: GZDoom, ZDoom

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J-VdS

Developed game: Mindustry

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J. Ali Harlow

Developed game: SLASH'EM

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J. Applegate

Developed game: Nuvie

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J. Cooper

Developed game: Forge

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J. Hunter Johnson

Developed game: PCGen

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J. Nathan Matias

Developed game: PLIB

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J. S.

Developed game: Vega Strike

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J. W. Bjerk

Developed game: The Battle for Wesnoth

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J.M. de Jong

Developed game: Unknown Horizons

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J.W

Developed game: Iter Vehemens ad Necem

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Ja-MiT

Developed game: The Battle for Wesnoth

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Jaakko Keränen

Developed game: Doomsday Engine

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Jaakko Niemi

Developed game: Crossfire

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Jaakko Perttilä

Developed game: Performous

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Jaakko Tapani Peltonen

Developed game: Falcon's Eye

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Jacek Nakonieczny

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Jack

Developed game: Vega Strike

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jack

Developed game: Godot

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Jack Andersen

Developed game: Metaforce

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Jack Bohlen

Developed game: Phantasy Star Rebirth

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Jack Boswell

Developed game: osu!

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Jack Coulter

Developed game: Openfrag

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Jack Cummings

Developed game: WorldForge

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Jack Edge

Developed game: Space Station 13

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Jack Greiner

Developed game: Naev

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Jack Lee

Developed game: osu!

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Jack McPherson

Developed game: LimonEngine

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Jack Morgan

Developed game: MegaMek

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Jack Rainy

Developed game: Unciv

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Jack Scotson

Developed game: osu!

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Jack Slater

Developed games: ioquake3, OpenArena Engine, Tremulous

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jack-the-BOSS

Developed game: XMage

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Jacker

Developed game: ET: Legacy

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Jackerty

Developed games: OpenMW, TES3MP

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JackLee9355

Developed game: osu!

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jackpotttt

Developed game: unitystation

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Jackson Davis

Developed game: OpenRCT2

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jacksonmj

Developed game: The Powder Toy

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Jacky Liang

Developed game: RuneLite

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Jacky720

Developed game: UndertaleModTool

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Jaco

Developed games: CorsixTH, OpenXcom

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Jacob

Developed game: osu!

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jacob berkman

Developed game: Aisleriot

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Jacob Burroughs

Developed game: SuperTux

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Jacob Deuchar

Developed game: Open Apocalypse

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Jacob Dufault

Developed game: OpenRA

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Jacob Essex

Developed games: OpenMW, TES3MP

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Jacob Ferrero

Developed games: Freeminer, Minetest

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Jacob L. Anawalt

Developed game: Batalla Naval

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Jacob McElroy

Developed game: RuneLite

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Jacob Nevins

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Jacob Odgård Tørring

Developed game: osu!

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Jacob Rask

Developed game: Freeciv-web

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Jacob Sweeten

Developed game: unitystation

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jacob1

Developed game: The Powder Toy

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Jacopo Santoni

Developed game: OpenMoM

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Jacquerel

Developed game: Space Station 13

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Jacques Chion

Developed game: Tux Paint

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Jae Yeum

Developed games: NBlood, PCExhumed, Rednukem

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Jae-Hong Lee

Developed game: COCOS2D-X

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Jaedan

Developed game: ClassicUO

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jafdy

Developed game: Endless Sky

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JagWire

Developed game: Vircadia

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Jai Sharma

Developed game: osu!

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Jaime Passos

Developed game: Sonic Robo Blast 2

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Jaime van Kessel

Developed game: EmptyEpsilon

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Jairo

Developed game: DNT

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jaj22

Developed game: Pioneer

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Jak Daniels

Developed game: Open Simulator

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Jak1

Developed game: The Mana World

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Jaka Kranjc

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Jake

Developed game: OpenDominion

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Jake Archibald

Developed game: proxx

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Jake Bailey

Developed game: pygame

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Jake Brown

Developed game: CivOne

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jakexblaster (Marcos Cunha)

Developed game: Open Tibia

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Jakim Friant

Developed game: AutoREALM

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Jakob Fries

Developed games: DDraceNetwork, Teeworlds

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Jakob Mulvad Nielsen

Developed game: CivOne

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Jakob Sinclair

Developed games: Godot, Sourcehold

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Jakub Friedl

Developed game: Tux Paint

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Jakub Janek

Developed game: Unknown Horizons

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Jakub Linhart

Developed games: ClassicUO, CrossUO

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Jakub Lukasik

Developed game: Lumix Engine

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Jakub Pavlík

Developed game: freeVikings

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Jakub Sandomierz

Developed game: Poland can into Space

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Jakub Vaněk

Developed games: Freeminer, Minetest, OpenBVE

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Jakub Šimek

Developed game: jMonkeyEngine

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jal76

Developed game: Spring: 1944

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jalbert-dev

Developed game: StepMania

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Jalleo

Developed game: Space Station 13

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Jalmari Ikävalko

Developed game: Beyond All Reason

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James

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James 'J.C.' Jones

Developed game: PLIB

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James A. Simons

Developed game: Wolfpack Empire

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James Albert

Developed game: PyTMX

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James Allenby

Developed game: Inexor

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James Allred

Developed game: MegaMek

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James Archbold

Developed game: Ancient Beast

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James B. Pollack

Developed game: Vircadia

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James B. Pollack, MFA

Developed game: Vircadia

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James Barnard

Developed game: Tux Racer

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James Broad

Developed game: Wargamer

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James Cameron

Developed game: Netrek

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James Canete

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James Carthew

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James Carty

Developed games: OpenMW, TES3MP

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James Czekaj

Developed game: pygame

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James Damour

Developed game: MegaMek

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James Gangur

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James Gardner

Developed game: Thousand Parsec

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James Gregory

Developed game: COCOS2D-X

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James Guillochon

Developed game: Endless Sky

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James Hale

Developed game: Sonic Robo Blast 2

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James Haley

Developed game: Chocolate Doom

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James Haley (Nightdive Studios)

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James Hodgson

Developed game: OpenDominion

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James Hofmann

Developed game: Iceball

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James Hood

Developed game: Simutrans

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James Khan

Developed game: jMonkeyEngine

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James Le Cuirot

Developed games: Commander Genius, freegish, SLADE

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James Likier

Developed game: Manic Digger

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James M Best

Developed game: WorldForge

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James Marshall

Developed game: Cat Mother Dead Justice

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James Meickle

Developed game: Dungeon Crawl Stone Soup

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James Neal

Developed game: RogueSharp

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James Packer

Developed game: Bridge Command

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James Paige

Developed games: O.H.R.RPG.C.E., Ren'Py

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James R.

Developed game: Sonic Robo Blast 2

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James Russell

Developed game: CorsixTH

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James Sherratt

Developed game: MegaGlest

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James Simonson

Developed game: unitystation

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James Simpson

Developed game: Isogenic Game Engine

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James Stone

Developed game: GL-117

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James Turner

Developed games: FlightGear, WorldForge

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James Urquhart

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James Wallen-Jones

Developed game: Open RSC

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James Watkins-Harvey

Developed game: LÖVE

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James Webb

Developed game: Lumix Engine

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James Westman

Developed game: Godot

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james4k

Developed game: OpenFL

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James58899

Developed game: osu!

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Jamie Taylor

Developed game: osu!

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JamieFristrom

Developed game: LambdaHack

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Jamieson Berida

Developed game: osu!

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Jamil Akram

Developed game: Vircadia

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Jamin Collins

Developed game: Forge

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jamrenaissance

Developed game: PCGen

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Jamuro-g

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Jan

Developed games: NBlood, PCExhumed, Rednukem, Thrive, Tremulous

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Jan Adamec

Developed game: Castle Game Engine

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Jan Beich

Developed games: OpenBOR, OpenRA

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Jan Boon

Developed game: Ryzom Core

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Jan Borsodi

Developed games: OpenMW, TES3MP

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Jan Ekholm

Developed game: Civil

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Jan Engelhardt

Developed games: Chocolate Doom, SLADE, ZDoom

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Jan Friederich

Developed game: Mmpong

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Jan Haller

Developed game: Godot

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Jan Jurzitza

Developed game: osu!

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Jan Korbel

Developed game: Simutrans

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Jan Krassnigg

Developed game: ezEngine

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Jan Kyselica

Developed game: Aisleriot

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Jan Lukas Gernert

Developed game: REGoth

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Jan Magne Tjensvold

Developed game: Stars! Nova

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Jan Mattner

Developed games: Ilarion, Illarion

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Jan Mulder

Developed games: Pendumito, WebHangman

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Jan Petykiewicz

Developed game: GemRB

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Jan Polák

Developed game: Mindustry

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Jan Raszyk

Developed game: ezQuake

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Jan Rietema

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Jan Schäfer

Developed game: JSkat

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Jan Urva

Developed game: phpRPG

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Jan Wynholds

Developed game: Tux Paint

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Jan Šimek

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Jan-Hendrik Peters

Developed game: Arx Libertatis

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Jan-Otto Kröpke

Developed game: 2Moons Browsergame Engine

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Jan-Peter Nilsson

Developed games: OpenMW, TES3MP

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Jana Mohn

Developed game: OpenSAGE

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Jana Weigel

Developed game: Unknown Horizons

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Janaszar

Developed game: Endless Sky

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Janet Hunt

Developed game: FreeLords

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Janet Walz

Developed game: NetHack

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JanetHunt

Developed game: Flare

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JanFokke

Developed game: MonoGame.Extended

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Jani Kajala

Developed game: Cat Mother Dead Justice

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Jani Mäkinen

Developed game: Unvanquished

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Janis Eisaks

Developed game: Sudokuki

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janKir

Developed game: boardgame.io

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Janne

Developed game: Ancient Beast

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Janne Johansson

Developed game: Haxima

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Janne Sinivirta

Developed game: AndEngine

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Jannik Vogel

Developed games: OpenRW, OpenSWE1R

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JANNiS

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Jannis Weis

Developed game: LITIENGINE

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jao

Developed game: DDraceNetwork

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Jared

Developed game: Snowballz

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Jared Adams

Developed games: Land of Fire, Mana, The Mana World

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Jared Miller

Developed game: Duality

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Jared Stephen

Developed game: Hale

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Jarek Lewandowski

Developed game: COCOS2D-X

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Jarewill

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JarheadHME

Developed game: Wind Waker Randomizer

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Jari

Developed game: Open Apocalypse

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Jari Karjala

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Jari Winberg

Developed game: Simple-Solitaire

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Jaroslav Benkovský

Developed game: GemRB

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Jarosław Zgierski

Developed game: osu!

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Jarrett Thomas

Developed game: Land of Fire

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Jarrod L. Miller

Developed game: XPilot

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Jarvik7

Developed game: Yamagi Quake II

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Jasmin Patry

Developed game: Tux Racer

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Jasmine Langridge

Developed game: Trigger Rally

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Jason

Developed games: boardgame.io, PCGen, Wargamer

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jason

Developed game: Gang Garrison 2

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Jason Benaim

Developed game: Chocolate Doom

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Jason Buchanan

Developed game: PCGen

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Jason Bush

Developed game: MegaMek

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Jason D. Clinton

Developed game: Aisleriot

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Jason Dorje Short

Developed game: Freeciv

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Jason Farmer

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Jason Felds

Developed games: Etterna, StepMania

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Jason Fields

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Jason Gilbert

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Jason Harrison

Developed game: boardgame.io

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Jason Hawks

Developed game: Vircadia

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Jason Hooks

Developed games: OpenMW, TES3MP

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Jason Johnson

Developed game: Dune Legacy

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Jason Jones

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Jason Klapste

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Jason Knight

Developed game: Godot

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Jason M Carlough

Developed game: DOOM Retro

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Jason Nunn

Developed game: Nighthawk

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Jason Rohrer

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Jason Smestad

Developed game: Valyria Tear

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Jason Smyrloglou

Developed game: MegaMek

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Jason Summers

Developed game: Golly

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Jason Tamez

Developed game: PCGen

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Jason Tighe

Developed games: MegaMek, MekWars

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Jason Wall

Developed game: XMage

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Jason Walsh

Developed game: StepMania

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Jason Winzenried

Developed game: Vega Strike

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Jason Won

Developed game: osu!

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Jason Wood

Developed game: Tux Football

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Jason Xu

Developed game: COCOS2D-X

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Jason Yates

Developed game: Aleph One

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Jasper De Sutter

Developed game: MonoGame.Extended

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Jasper Spaans

Developed game: PCGen

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Jasper v. B.

Developed game: openage

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Jasper Van der Jeugt

Developed game: Annchienta

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jastiv

Developed game: Wograld

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Jat15

Developed game: Minetest Game

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Javier A. Ortiz Bultron

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Javier Ayres

Developed game: Lona

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Javier Jardón

Developed games: Aisleriot, Atomix, xoreos

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Javier Marín

Developed game: SharpKonquest

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Javier Torrente

Developed game: eAdventure

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javila

Developed game: Land of Fire

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JaxLin

Developed game: KlayGE

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Jay Atkinson

Developed game: OpenXcom

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jay binks

Developed game: UltraStar Deluxe

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Jay Fenlason

Developed game: Hack

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Jay French

Developed game: Space Trader for Windows

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Jay Kint

Developed game: Omega-rpg

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Jay Lawton

Developed game: osu!

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Jay Oster

Developed game: melonJS

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Jay Peet

Developed game: R.E.L.I.V.E.

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Jay Sistar

Developed games: Atomic Game Engine, OpenFL

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jay wellings

Developed game: Mpango

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Jay_H

Developed game: Daggerfall Unity

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Jayden

Developed game: osu!

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JayH2971

Developed game: Daggerfall Unity

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Jayme Cox

Developed game: PCGen

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jaytersen

Developed game: Unvanquished

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JaytleBee

Developed game: unitystation

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Jazcash

Developed game: Beyond All Reason

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Jazmin

Developed game: Vircadia

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jazz mickle

Developed game: DelverEngine

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jazztickets

Developed games: Choria, Empty Clip, irrlamb

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jazzvaz

Developed game: OpenXRay

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Jbaukens

Developed game: 2Moons Browsergame Engine

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jbot-42

Developed game: The Powder Toy

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jbuck3

Developed game: Godot

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JC Snider

Developed game: Intersect

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jcaesar

Developed game: OpenClonk

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jcd000

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jcnossen

Developed game: Spring

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jcreusand

Developed game: Freeciv

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jdah

Developed game: minecraft-weekend

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JDarthenay

Developed game: OpenXcom

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jdeblander

Developed game: LITIENGINE

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jdempsey-au

Developed game: PCGen

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jdgleaver

Developed game: TyrQuake

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jdh

Developed game: minecraft-weekend

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jdigreze

Developed game: Unknown Horizons

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jdrueckert

Developed game: Terasology

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Jean Jung

Developed game: Godot

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Jean Karim Bockstael

Developed game: MicroWar 2.0

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Jean Lepropre

Developed game: FreeCol

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Jean Luc PONS

Developed game: BlockOut II

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jean pellotier

Developed game: FlightGear

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Jean-Baptiste "Jiba" Lamy

Developed game: Slune
Organization: Nekeme Prod.

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Jean-Baptiste Onofré

Developed game: XMage

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Jean-Christophe Collet

Developed game: NetHack

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Jean-Denis Boivin

Developed game: OpenFL

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Jean-Francois Renaud

Developed game: jMonkeyEngine

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Jean-Francois Romang

Developed game: Stockfish

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jean-manuel clemençon

Developed game: SuperTuxKart

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Jean-Marc Le Peuvedic

Developed game: GL-117

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Jean-Martin Miljours

Developed game: CrossUO

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Jean-Michel Baudrey

Developed game: Duckmaze

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Jean-Michel Bernard

Developed game: Godot

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Jean-Michel Martin de Santero

Developed games: Powermanga, TecnoballZ

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Jean-Patrick Guerrero

Developed games: Freeminer, Minetest, Minetest Game

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Jean-Philippe Meuret

Developed game: Speed Dreams

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Jean-Pierre Sabbagh

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Jean-Vivien Maurice

Developed game: Extreme Tux Racer

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Jeannette Bilton

Developed game: Freya Game Engine

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JeeZ

Developed game: Spring

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Jeff

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Jeff Baril

Developed game: PCGen

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Jeff Breidenbach

Developed game: Pioneers

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Jeff Clinton

Developed game: Vircadia

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Jeff Cotter

Developed game: Wolfpack Empire

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Jeff Coyle

Developed game: VASSAL

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Jeff Freedman

Developed game: Exult

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Jeff Goodenough

Developed game: Daimonin

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Jeff Graw

Developed game: Vega Strike

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Jeff Huang

Developed games: Freeminer, Minetest

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Jeff Hutchinson

Developed game: Torque 3D

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Jeff Koerner

Developed game: Pizza Business

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Jeff Makey

Developed game: BZFlag

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Jeff Nowakowski

Developed game: Netrek

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Jeff Thoene

Developed game: Shotgun Debugger
Organization: Game Creation Society

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Jeff Vogel

Developed game: Classic Blades of Exile
Organization: Spiderweb Software

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Jeff Wadsworth

Developed game: XMage

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Jeff Wang

Developed games: COCOS2D-X, MegaMek

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jeff-kelley

Developed game: Open Simulator

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Jeffery Myers

Developed game: BZFlag

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Jeffrey 'Sigurd' Westcoat

Developed game: The Battle for Wesnoth

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Jeffrey Haines

Developed games: OpenMW, TES3MP

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Jeffrey Han

Developed game: opsu!

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Jeffrey Lucas Eldridge

Developed game: The Battle for Wesnoth

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Jeffrey Sanders

Developed game: Bygfoot

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Jeffrey Veenhuis

Developed game: LBA2 Remake

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Jeffrey Ventrella

Developed game: Vircadia

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jekin trivedi

Developed game: WorldForge

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Jenna Trassa

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jennaingersoll

Developed game: Vircadia

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Jens

Developed game: Ambermoon.net

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Jens A. Koch

Developed game: FIFE

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Jens Ayton

Developed game: Oolite

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Jens Fischer

Developed games: HaxeFlixel, OpenFL

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Jens Fursund

Developed game: Qonk

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Jens Rottmann

Developed game: Minetest

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Jens Schmer

Developed game: PixelLight

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jenschou

Developed game: Angband

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jensj12

Developed game: OpenRCT2

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Jeongin Lee

Developed game: Commander Genius

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Jerek Wilson

Developed game: XMage

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Jeremiah

Developed game: Space Station 13

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Jeremiah D. Powell

Developed game: Ogrian Carpet

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Jeremiah Morris

Developed game: Aleph One

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Jeremiah Sypult

Developed games: ioquake3, OpenArena Engine, Tremulous

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Jeremy

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Jeremy Bicha

Developed game: Aisleriot

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Jeremy Cochoy

Developed game: ClanLib

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Jeremy D. Monin

Developed game: JSettlers

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Jeremy Glazebrook

Developed game: FreeSO

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Jeremy Liberman

Developed game: unitystation

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Jeremy List

Developed game: Pioneer

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Jeremy Munson

Developed game: Zero-K

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Jeremy Newman

Developed game: Nuvie

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Jeremy Osborne

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Jeremy Pallats/starcraft.man

Developed game: PCGen

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Jeremy Parsons

Developed game: Aleph One

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Jeremy Plsek

Developed game: RuneLite

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Jeremy Reeves

Developed game: Decker

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Jeremy Rose

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Jeremy Sheeley

Developed game: Kobo Deluxe

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Jeremy Van Grinsven

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Jeremy Whiting

Developed game: Blinken

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Jerimee Richir

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Jeroen

Developed games: melonJS, RuneLite

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Jeroen Baert

Developed game: Vircadia

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Jeroen Boukens

Developed game: Red Eclipse

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Jeroen Broks

Developed game: Sudokuki

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Jeroen Carolus

Developed game: android-chess

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Jeroen Groeneweg

Developed game: Smash Battle

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Jeroen Reurings

Developed game: melonJS

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Jeroen Sack

Developed game: OpenRCT2

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JeroenDStout

Developed game: OpenRCT2

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JEROME BIGOT

Developed game: Bombermaaan

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Jerome Marty

Developed game: Commander Genius

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Jerome Touffe-Blin

Developed game: PCGen

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Jerrad Bieno

Developed game: XMage

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Jerry

Developed game: VASSAL

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Jerry Jiang

Developed game: 2048

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Jerzozwierz

Developed game: Mindustry

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Jesse Jaara

Developed game: The Powder Toy

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Jesse Jennings

Developed game: XMage

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Jesse Luehrs

Developed game: Dungeon Crawl Stone Soup

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Jesse Manning

Developed game: FIFE

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Jesse Myers

Developed game: osu!

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Jesse Ruderman

Developed game: HyperRogue

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Jesse Serrao

Developed game: RuneLite

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Jesse Simko

Developed game: Aleph One

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Jesse Smith

Developed games: Atomic Tanks, SDL Sopwith

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Jessica Beller

Developed games: Land of Fire, Source of Tales

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Jessica Hawkwell

Developed game: Terasology

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Jessica Lord

Developed game: Morpheus Web Remake

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Jessica Meng

Developed game: osu!

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Jessie Grosen

Developed game: Vircadia

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JesterX666

Developed game: unitystation

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Jesusalva

Developed game: The Mana World

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Jesusaves

Developed game: The Mana World

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jesusjbr

Developed game: XMage

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Jetro Lauha

Developed game: Pathogen Warrior

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Organization: Game Creation Society

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John Smith

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John Stahara

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John Stilley

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Jonathan Clark

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Jonathan Dowland

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Jonathan E. Wright

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Jonathan Esk-Riddell

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Jonathan Evraire

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Jonathan Freedman

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Jonathan G Rennison

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Jonathan Haas

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Jonathan Hamilton

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Jonathan M. Franz

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Jonathan Mercier-Ganady

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Jonathan Neuschäfer

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Jonathan Nicholas

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Jonathan Nicholl

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Jonathan Payne

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Jonathan Powell

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Jonathan Riddell

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Jonathan Rubenstein

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Jonathan Sieber

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Jonathan Skeate

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Jonathan Stickles Fox

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Jonathan Toomim

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Joost Peters

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Jordan Ayers

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Jordan Brown

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Jordan Irwin

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Jordan Milne

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Jordan Snelling

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Joris Beugnies

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Jorrit Tyberghein

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Joseph Baffaro

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Joseph Davies

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Joseph Ni

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Developed game: osu!

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Josh Allen

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Josh Bodily

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Josh Bolduc

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Josh Bressers

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Josh Davidson

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Josh Gelbard

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Josh Goebel

Developed game: TIC-80

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Josh Hoover

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Josh Jones

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Josh Katz

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Josh Keegan

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Josh Kelley

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Josh M.

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Josh Richey

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Josh Shippam

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Josh Steinhauer

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Josh Tynjala

Developed game: OpenFL

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Josh Ventura

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Josh Zacharias

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JoshEngebretson

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Joshi1999

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Joshua Bartz

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Joshua Blocher

Developed game: Red Eclipse

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Joshua Bodine

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Joshua Chin

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Joshua Fehler

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Joshua Filby

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Joshua Glatt

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Joshua Granick

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Joshua McKenty

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Joshua Minor

Developed games: LIKO-12, TIC-80

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Joshua Ols

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Joshua Robinson

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Joshua Wilson

Developed game: Crossfire

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Joshua Woodie

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Joshua Yockey

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Josip Komljenović

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Josip Matić

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José Cadete

Developed games: Augustus, Julius

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José Robson Mariano Alves

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José Tomás Tocino

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Developed game: Thousand Parsec

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Jozef Behran

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João Henrique

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JP Cimalando

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JP LeBreton

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Developed game: Arx Libertatis

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Developed game: OpenRA

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Developed games: OpenMW, TES3MP

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Developed game: Mindustry

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Developed games: Odamex, OpenRA

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Developed game: Zero-K

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Developed game: Ren'Py

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Developed game: Visual Pinball

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Developed game: Terasology

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Juan Dalmasso

Developed game: Argentum Online

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Developed game: Polis

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Developed game: OpenDiablo2

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Developed game: Planetary Hoppers

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Julia Nechaevskaya

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Julien Nguyen

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Julien Voisin

Developed games: OpenMW, TES3MP

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Developed game: Ren'Py

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JumboDS64

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Developed game: Godot

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Jun Hyeon, Nam

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Jun Kim

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Jungy

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Developed game: OpenFL

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Juraj Michalek

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Juraj Oravec

Developed games: glPortal, RadixEngine

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Jure Repinc

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Juriy Petrochenkov

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Jussi Lind

Developed game: Dust Racing 2D

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Jussi Pakkanen

Developed game: Doom Legacy

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JustAnotherGuid

Developed games: Devilution, DevilutionX

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Developed games: C-Dogs SDL, Flare, FreeBlocks

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Developed game: One Hour One Life

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Developed games: Naev, Nox Imperii

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Jute Gyte

Developed game: Blasphemer

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Developed game: PainTown

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Developed game: openage

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Jyrki Vesterinen

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Ján Jančár

Developed game: Godot

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Jérôme Arzel

Developed game: Q-Gears

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Developed game: TecnoballZ

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Developed game: Godot

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Jérôme Gully

Developed game: Godot

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Jérôme Leclercq

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Developed game: FreedroidRPG

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József Sallai

Developed game: doukutsu-rs

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Jörg Oster

Developed game: Stockfish

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Jörn Eichler

Developed game: SuperTuxKart

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Jørgen P. Tjernø

Developed games: CorsixTH, GoldenEye: Source

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Jørn Lomax

Developed game: OpenRCT2

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Jürgen Marquardt

Developed game: PLIB

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Jānis Legzdiņš

Developed game: Korax' Heritage

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Jānis Rūcis

Developed games: NetRadiant-custom, Neverball

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Jřrgen Vasshaug

Developed game: FreeCol

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