Games starting with O

puzzle clone skill
Details
Code languages: C++
Code licenses: MIT
Code repositories: sharkwouter/oceanpop.git(since 2020, )
Build system: CMake
Developers: ProTheory8, Wouter Wijsman
action content open
Details
Code languages: C++
Code licenses: MIT
Code repositories: git.code.sf.net/p/ogrian/code
Developers: Jeremiah D. Powell, Mike Prosser, Wh-
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: hg.code.sf.net/p/osrpgcreation/code
Code dependencies: CEGUI, OGRE
Build system: CMake
Developers: AleXXandEr, Kai SD, kornerr, kornerrjenkins, Opensource Game Studio, xmorph
arcade content open side-scrolling
Homepage: osgg
Download: osgg/files
Details
Code languages: C++, C
Code licenses: GPL-3.0
Code repositories: DusteDdk/osgg.git(since 2012, ), osgames/osgg.git @add(since 2019, ), svn.code.sf.net/p/osgg/code
Code dependencies: OpenGL, SDL
Assets licenses: Artistic license-1.0
Build system: Make
Developers: Dmitry Marakasov, Jimmy, Jimmy Christensen
strategy content open real-time space
Homepage: movitto/omega
Details
Code languages: JavaScript, Ruby
Code licenses: AGPL-3.0
Code repositories: movitto/omega.git(since 2009, )
Assets licenses: CC BY-SA, Public domain, GPL
Developers: Mo Morsi, Mohammed Morsi, Nicolas Satragno, Nina Satragno
remake content commercial original required
Details
Code languages: C
Code licenses: GPL-2.0
Code repositories: sulix/omnispeak.git(since 2012, )
Build system: Make
Developers: David Gow, Martin Fiedler, NY00123, owenmpierce, Szilárd Biró
remake content open multiplayer online
Details
Code languages: C, C++, PHP
Code licenses: Public domain
Code repositories: jasonrohrer/OneLife.git(since 2017, )
Assets licenses: Public domain
Developers: Jason Rohrer, Justin Love
arcade content open
Details
Code languages: Python
Code licenses: GPL-2.0
Code dependencies: pygame
Assets licenses: GPL-2.0
Developer: Olli Etuaho
Details
Code languages: Lua
Code licenses: GPL-3.0
Code dependencies: LÖVE
strategy chess
Details
Code languages: PHP, JavaScript
Code licenses: GPL-2.0
Code repositories: svn.code.sf.net/p/lgames/code
Developer: Michael Speck
simulation 3D clone space trading
Details
Code languages: Objective-C, C, JavaScript
Code licenses: GPL-2.0
Code repositories: OoliteProject/oolite.git(since 2013, )
Code dependencies: Cocoa, SDL
Assets licenses: CC-BY-NC-SA
Developers: (12)
AnotherCommander, cim, cube, DaymareOn, Eric Walch, Jens Ayton, jobi-wan, Kaks, Kevin Anthoney, Konstantinos Sykas, Nick Rogers, phkb

remakestrategy content commercial original required
Details
Code languages: Java
Code licenses: MIT
Code repositories: GunshipPenguin/open_flood.git(since 2016, )
Build system: Gradle
Developer: Rhys Rustad-Elliott
remake content commercial + open original required
Homepage: openfodder.com
Inspiration: Cannon Fodder
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: OpenFodder/openfodder.git(since 2012, )
Developers: drnovice, Robert Crossfield
remake content commercial modification multiplayer competitive + online + LAN + co-op + matchmaking
Homepage: openfortress.fun
Inspiration: Team Fortress 2
Details
Code languages: C++
Code licenses: CC-BY-NC-SA-4.0, Custom
Code repositories: KaidemonLP/Open-Fortress-Source.git, svn.openfortress.fun/svn/open_fortress
Code dependencies: Source SDK
arcade clone content open
Homepage: troel.net/opengreedy
Inspiration: Pac-Man
Details
Code languages: C
Code licenses: GPL-2.0
Code repositories: atroel/open-greedy.git(since 2014, )
Code dependencies: SDL2
Developer: atroel
puzzle clone
remakesimulation content commercial flight original required
Details
Code languages: C++
Code licenses: MIT
Code repositories: undefined-darkness/open-horizon.git(since 2014, )
Code dependencies: nya-engine
Developer: undefined-darkness
remakestrategy turn-based
Details
Code languages: Java
Code licenses: LGPL-3.0
Code repositories: akarnokd/open-ig.git(since 2015, )
Developers: David Karnok, Péter Kovács, Robikz, Zoltan
remakerole playingsimulation multiplayer online space
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: git.code.sf.net/p/opengate/code
Developers: Christoph Brill, Daniel S., spom_spom
Details
Code languages: Java
Code licenses: MIT
Code repositories: ssenegas/kickoff.git(since 2016, )
Build system: Gradle
Developer: Sébastien Sénégas
Details
Code languages: None
Code licenses: Custom
Code repositories: openlegend/core-rules.git(since 2014, )
Developers: Brian Feister, Cryogenic, Fabio Endrizzi, Great Mustache Jonathan, istabosz, Mario Lurig, Matthew O'Connor, Michael Loubier, R.J. Wood
remakerole playing multiplayer online + massive
remakestrategy online tiles turn-based
Details
Code languages: JavaScript
Code licenses: GPL-2.0
Code repositories: nicupavel/openpanzer.git(since 2012, )
Developers: Iulian Luca, Nicu Pavel
strategy content open
Details
Code languages: C
Code licenses: GPL-2.0
Code repositories: osgames/openquartz.git(since 2019, ), openquartz.cvs.sourceforge.net
Assets licenses: ?
Build system: Make
Developers: Bill Currie, Charles Galbraith, David Costanzo, Gargoylol, Mapes, Seth Galbraith, Toddd
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: svn.uktrainsim.com/svn/openrails
Details
Code languages: C++
Code licenses: MIT
Code repositories: pierreyoda/o2r.git(since 2017, ), svn.code.sf.net/p/o2r/code
Code dependencies: Qt, SFML
Developers: Pierre, Pierre-Yves
remakerole playing multiplayer online + massive
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: luckeyproductions/games/OpenSaucer.git(since 2021, )
Code dependencies: Dry
Build system: QMake
Developer: LucKey Productions
simulation content open
Details
Code languages: PHP
Code licenses: GPL-3.0
Code repositories: dmecke/OpenSoccerStar.git(since 2014, )
Developer: Daniel Mecke
Details
Code languages: C
Code licenses: GPL-3.0
Code repositories: alemart/opensurge.git(since 2018, ), svn.code.sf.net/p/opensnc/code
Code dependencies: Allegro
Build system: CMake
Developers: (13)
Alexandre Almeida, Alexandre Martins, Arthur Blot, Christian Zigotzky, Christopher Martinus, Francesco, Halatnikov, Reimund Renner, SecularSteve, Stilic, Stylix58, Szymon Weihs, Tomires

Homepage: opensyobon
Inspiration: Shobon Action
Download: opensyobon/files
Details
Code languages: C++
Code licenses: ?
Developer: Mathew Velasquez
Homepages: opentibia, opentibia
Inspiration: Tibia
Download: opentibia/files
Details
Code languages: C++
Code licenses: CC-BY-NC-SA-4.0
Code repositories: gitea.it/rixty/OpenValley.git
Code dependencies: SDL2, Flare engine
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: git.code.sf.net/p/openyahtzee/code, osgames/openyahtzee.git @add(since 2019, )
Developers: Guy Rutenberg, Journeyman, smcgill
action clone content commercial original required
Details
Code languages: C, C++
Code licenses: zlib
Code repositories: openzelda/openzelda-source.git(since 2015, )
Assets licenses: proprietary, CC-BY-NC-SA-3.0, CC-BY-SA-2.5
remake content commercial original required
Homepage: r1sc/Open76
Inspiration: Interstate '76
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: r1sc/Open76.git(since 2017, )
Code dependencies: Unity
Developers: Johan Rensenbrink, r1sc
remakestrategy content commercial original required real-time
puzzle content open
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: svn.code.sf.net/p/openalchemist/code
Code dependencies: ClanLib
Assets licenses: CC-BY-SA 2.0
Developers: Antoine Morineau, Gecko667, guigoz, Guillaume Delhumeau, MrPouit, silkut
simulation clone content commercial management
Homepage: Mige5/openarena
Inspiration: Arena 5
Details
Code languages: Java
Code licenses: GPL-3.0
Code repositories: Mige5/openarena.git(since 2022, )
actionremake first-person shooter
actionremake content commercial original required shooter
Homepage: OpenAWE-Project/OpenAWE
Inspiration: Alan Wake
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: OpenAWE-Project/OpenAWE.git(since 2021, )
Build system: CMake
Developers: Max Black, Patrick Dworski
actionremake content commercial
Details
Code languages: Go
Code licenses: MIT
Code repositories: OpenBiohazard2/OpenBiohazard2.git(since 2020, )
Developer: Samuel Yuan
remakesimulation content commercial original required
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: openblack/openblack.git(since 2018, )
Code dependencies: OpenGL, SDL2
Build system: CMake
Developers: FalseIlyu, Matt, Matt Stevens, Michał Janiszewski, NeroBurner, raffclar, Sandy
puzzle clone
Homepage: mmatyas/openblok
Inspiration: Tetris
Download: mmatyas/openblok/releases
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: mmatyas/openblok.git(since 2016, )
Build system: CMake
Developers: Mátyás Mustoha, Wouter Wijsman
simulation game maker
Details
Code languages: Python, Lua
Code licenses: GPL-3.0
Code repositories: hg.code.sf.net/p/openblox/openblox, osgames/openblox.git @add(since 2019, ), hg.code.sf.net/p/openblox/bloxstaller
Code dependencies: Panda3D, wxPython
Assets licenses: CC-BY-SA-3.0
Developers: Alfredzo Nash, Bednesti, brutustodd, Chris Bradley, DangerOnTheRanger, Danny Green, Oliver Frye, TheEnd
arcaderemake artillery content commercial multiplayer Competitive + Online original required
Homepage: WickedPeanuts/OpenBound
Inspiration: Gunbound
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: WickedPeanuts/OpenBound.git(since 2020, )
Build system: VisualStudio
Developer: Carlos H. M. S.
simulation clone content open
Details
Code languages: C#
Code licenses: Public domain
Code repositories: leezer3/OpenBVE.git(since 2015, )
Developers: BX Zhang, Christopher Lees, Connor Fitzgerald, Jakub Vaněk, LX862, Marc Riera, Maurizio M. Gavioli, Nemo, s520
simulation 3D clone
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: osgames/opencity.git(since 2019, ), svn.code.sf.net/p/opencity/code, opencity.cvs.sourceforge.net
Developers: Duong Khang NGUYEN, frodrigo
remakestrategy content commercial turn-based
Details
Code languages: C#
Code licenses: MIT
Code repositories: rajko-horvat/OpenCiv1.git
remake content commercial original required
Homepage: pjasicek/OpenClaw
Inspiration: Claw
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: pjasicek/OpenClaw.git(since 2017, )
Code dependencies: Box2D, SDL
Build system: CMake
Developers: Bakasura, Denis Papec, Dmitrii Dementev, Pavel Löbl, Petr Jašíček
Homepage: www.openclonk.org
Media: OpenClonk
Inspiration: Clonk
Download: www.openclonk.org/download
remake content commercial original required
Details
Code languages: C++
Code licenses: MIT
Code repositories: gurka/OpenCrystalCaves.git(since 2017, )
Developers: Cong, Simon Sandström
actionremake content commercial original required
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: eezstreet/OpenD2.git(since 2017, )
Build system: CMake
Developer: Nick
Homepage: volca02/openDarkEngine
Inspiration: Thief
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: volca02/openDarkEngine.git(since 2014, )
Build system: CMake
Developers: Gorbeh, volca02
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: kcat/opendf.git(since 2015, )
Build system: CMake
Developers: Cornee Traas, kcat
actionremakerole playing content commercial original required
strategy clone content open multiplayer online text-based
Homepage: www.opendominion.net
Inspiration: Dominion
Details
Code languages: PHP
Code licenses: AGPL-3.0
Code repositories: OpenDominion/OpenDominion.git(since 2015, )
Code dependencies: Laravel
Developers: (12)
barmmie, Christopher Smith, Cody Kinsey, Guilherme Portela, Gustavo Straube, Jake, James Hodgson, John Strömblom, Kender2, MJBrennan, Ope Aina, WaveHack

remakestrategy real-time
Homepage: rofl0r/openDOW
Inspiration: Dogs of War
Details
Code languages: C
Code licenses: GPL-3.0
Code repositories: rofl0r/openDOW.git(since 2013, )
Build system: Make
Developer: rofl0r
remakestrategy content free real-time
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: drogoganor/OpenDR.git(since 2018, )
Code dependencies: OpenRA
Developers: abcdefg30, David Wilson, Matthias Mailänder, Paul Chote, phrohdoh
actionremake content commercial original required
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: Zalasus/opendrakan.git(since 2018, )
Build system: CMake
Developers: BuXXe, Markus Jylhänkangas, Zalasus
remakestrategy content commercial original required
Homepage: OpenDUNE/OpenDUNE
Inspiration: Dune 2
Download: OpenDUNE/OpenDUNE/releases
Details
Code languages: C
Code licenses: GPL-2.0
Code repositories: OpenDUNE/OpenDUNE.git(since 2012, )
Developers: drnovice, glx22, KO Myung-Hun, Loïc Guilloux, Máximo Castañeda, Olaf van der Spek, Patric Stout, Thomas BERNARD, wangds, Xaroth
strategy clone real-time
strategy clone content open real-time
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: tomluchowski/OpenDungeonsPlus.git
remakestrategy content commercial real-time
Homepage: opene2140/opene2140
Inspiration: Earth 2140
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: opene2140/opene2140.git(since 2020, )
Build system: CMake
remakerole playing content commercial engine original required
Details
Code languages: C++
Code licenses: LGPL-3.0
Code repositories: OpenEnroth/OpenEnroth.git(since 2016, )
Build system: CMake
Developers: (12)
Aleksey Komarov, Alex, Alexander Izmailov, Baste Nesse Buanes, botanicvelious, captainurist, Eksekk, Konstantin Kuzov, Nik-RE-dev, pskelton, Yury Klushin, zippanto

Homepage: etg.dek.im
Inspiration: Elements
Play online: etg.dek.im
Details
Code languages: JavaScript, Rust
Code licenses: MIT
Code repositories: serprex/openEtG.git(since 2013, )
Developers: elysiumplain, Philip Dubé, Trevor Sayre, Wesley M. Botello-Smith
action clone
Details
Code languages: C
Code licenses: MIT
Code repositories: Last-Minute-Creations/openFire.git(since 2016, )
Developer: KaiN
remakesimulation content open
Details
Code languages: C
Code licenses: GPL-2.0
Code dependencies: SDL
role playing clone content open
Details
Code languages: C
Code licenses: MIT
Code repositories: MotoLegacy/OpenFNaF.git(since 2019, )
Code dependencies: SFML
Developers: cypress, darkhaven3, Ian
action first-person setting medieval shooter
remake scrolling skill
Details
Code languages: C++
Code licenses: GPL-2.0
remake cars racing
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: capnramses/opengl_test_drive_clone.git(archived, since 2014, )
Code dependencies: OpenGL
Developer: Anton Gerdelan
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: git.code.sf.net/p/snowstorm/git, osgames/snowstorm.git @add(since 2019, )
Code dependencies: SDL
Developers: Jonny D, Sean Ford, Zardus
platformremake content commercial engine original required
Homepage: Mandarancio/OpenGOO
Inspiration: World of Goo
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: Mandarancio/OpenGOO.git(since 2011, )
Code dependencies: Qt
Build system: QMake
Developers: Adam Mizerski, Dmitry Batarov, Fabrizio Signoretti, Marco Torsello, Martino Ferrari, Oleksiy Slyshyk
actionremake content commercial original required
Homepage: ogta.fifengine.de
Inspiration: Grand Theft Auto
Details
Code languages: C++
Code licenses: Custom
Code repositories: madebr/OpenGTA.git(since 2015, )
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: osgames/openhomm.git(since 2019, ), code.launchpad.net/openhomm
Code dependencies: Qt, SDL
Build system: QMake
Developers: crackedmind, Ice
remakestrategy content commercial original required turn-based
Homepage: TalonBraveInfo/OpenHoW
Inspiration: Hogs of War
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: TalonBraveInfo/OpenHoW.git(archived, since 2017, )
Code dependencies: OpenAL, SDL2
Build system: CMake
Developers: Bonerlord, Daniel Collins, DummkopfOfHachtenduden, Mark Sowden, Stefano
strategy content open multiplayer online + LAN real-time
Details
Code languages: C#, Lua
Code licenses: GPL-3.0
Code repositories: OpenHV/OpenHV.git(since 2019, )
Code dependencies: OpenRA
Assets licenses: CC-BY-3.0, CC-BY-SA-4.0
Build system: Make, msbuild
Developers: dnqbob, Dzierzan, Matthias Mailänder, Paweł Dzierżanowski, SeanScherer, William Weber Berrutti, Zimmermann Gyula
music entertainment
Details
Code languages: C, C++
Code licenses: MIT
Code repositories: openitg/openitg.git(archived, since 2011, )
Build system: Autoconf
Developers: August Gustavsson, Carl Myers, DataBeaver, Kate Gray, Mikko Rasa, mooinglemur, spigwitmer, Toni Spets, vyhd
arcaderemake content commercial + original required
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: AlisterT/openjazz.git(since 2014, )
Code dependencies: SDL
Build system: CMake, Make
Developers: AlisterT, Carsten Teibes, Fabian Greffrath, Mike Purvis, Przemysław Buczkowski, Scott, StanB123
actionremake content commercial original required shooter
Details
Code languages: C
Code licenses: ISC
Code repositories: shinyquagsire23/OpenJKDF2.git(since 2018, )
Build system: CMake
Developers: Anno, Max Thomas, Strike
remake content commercial original required
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: IceReaper/OpenKrush.git(since 2018, )
Code dependencies: OpenRA
Developers: abcdefg30, Andre Mohren, Dzierzan, Paul Chote, Paweł Dzierżanowski, phrohdoh, taryn
Details
Code languages: C++, C
Code licenses: 2-clause BSD
Code repositories: XProger/OpenLara.git(since 2016, )
Code dependencies: WebGL
Developers: (11)
Gh0stBlade, laripette, Leo-89, Manuel Alfayate Corchete, Pablo Maiolo, Saracen, SaracenOne, Timur Gagiev, Torsten Kammer, vaguerant, vanfanel2

actionarcaderemake content open multiplayer split-screen
Details
Code languages: C++, C
Code licenses: Custom
Code repositories: gliptic/liero.git(since 2014, )
Code dependencies: SDL
Developers: Anders Höckersten, gliptic
Details
Code languages: C++
Code licenses: LGPL-2.0
Code repositories: albertz/openlierox.git(since 2011, ), git.code.sf.net/p/openlierox/code
Build system: CMake
Developers: Albert Zeyer, Karel Petránek, lxkurko, Martin Erik Werner, Olof Larsson, Sergii Pylypenko, yuri
remakesimulation content commercial original required transport
arcaderemake content commercial multiplayer LAN original required racing
Homepage: OpenMC2/OpenMC2
Inspiration: Midnight Club II
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: OpenMC2/OpenMC2.git(since 2016, )
Developers: Duncan, LRFLEW
actionremake shooter
Details
Code languages: C, C++
Code licenses: GPL-2.0
Code repositories: openmoh/openmohaa.git(since 2015, )
Developers: pryon, RyBack, smallmodel
strategy clone content commercial original required
Homepage: Jakz/openmom
Inspiration: Master of Magic
Details
Code languages: C, C++
Code licenses: GPL-3.0
Code repositories: Jakz/openmom.git(since 2014, )
Code dependencies: SDL2
Build system: CMake
Developer: Jacopo Santoni
remakestrategy content commercial original required turn-based
Details
Code languages: Python
Code licenses: GPL-2.0
Code repositories: pjotrligthart/openmoo2-hg-mirror.git(since 2015, )
Code dependencies: pygame
Build system: setup.py
Developer: II9T5
action clone
Details
Code languages: C++, Perl
Code licenses: GPL-2.0
Code repositories: osgames/openmortal.git(since 2019, ), openmortal.cvs.sourceforge.net
Build system: Make
Developers: arvind, Gabor Sebestyen, Kami, openmortaldev, UPi
action emulator
remake content commercial
Details
Code languages: Kotlin, Java
Code licenses: GPL-3.0
Code repositories: xyzz/openmw-android.git(archived, since 2018, )
Build system: Gradle
Developers: Bret Curtis, Licaon_Kter, sandstranger, xyzz
remakerole playing content commercial engine
Details
Code languages: C#, Lua
Code licenses: MIT
Code repositories: OpenNefia/OpenNefia.git(since 2021, ), Ruin0x11/OpenNefia.git
Build system: VisualStudio
Developers: kekobleibtkeko, Ruin0x11, zhguyu
actionremake content commercial shooter
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: BBQGiraffe/OpenNitemare3D.git(since 2019, )
Build system: VisualStudio
Developer: BBQGiraffe
actionpuzzleremake content commercial original required survival
Homepage: verhoevenv/OpenNotrium
Inspiration: Notrium
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: verhoevenv/OpenNotrium.git(since 2014, )
Code dependencies: SDL2
Developers: Eduardo Pinho, Vincent Verhoeven
actionremake content commercial multiplayer Online + LAN original required
Homepage: www.patreon.com/opennox
Inspiration: Nox
Details
Code languages: C, Go
Code licenses: GPL-3.0
Code repositories: noxworld-dev/opennox.git(since 2019, )
Build system: Make
Developers: angrykirc, Anton, Denys Smirnov, Evengard, Jeong, Heon, paperjack93
actionremake content commercial original required
Details
Code languages: C, C++
Code licenses: MIT
Code repositories: omf2097/openomf.git(since 2013, )
Build system: CMake
Developers: Alexander Weps, Andreas Gnau, Andrew Thompson, animehunter, Giuseppe Deda, Martti Rannanjärvi, Snafulator, TheOnlyJoey, Tuomas Virtanen
remakestrategy multiplayer online + LAN real-time
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: OpenRA/OpenRA.git(since 2010, )
Developers: (132)
abc013, abcdefg30, abmyii, Adam Mitchell, Alexander Fast, alexander-boll, Alexandre Oliveira, Alexis Hunt, Alfredo Brandau, Alli, Andre Mohren, Andrew Odintsov, anvilvapre, AoAGeneral, Arular101, atimoschenkow, atlimit8, BGluth, blackhand1001, Booom3, Braxton Williams, Carko, CH4Code, Chris Forbes, Christopher Grant, clemty, Clément Bœsch, Cody Brittain, Curtis Shmyr, Daniel Hernandez, Danny Keary, darkademic, David Jiménez, David Wilson, DeadlySurprise, Deniz, Dmitri Suvorov, dnqbob, DSUK, earthpig, Eduardo Cáceres, epicelite, evgeniysergeev, forcecore, fruestueck, Glenn Martin Jensen, GSonderling, Gustas, Heli Aldridge, Hellhake, HenrytheSlav, Ian T. Jacobsen, Igor Popov, Inq8, Ivaylo Draganov, Jacob Dufault, Jan Beich, John Turner, Jonas A. Lind, Jonathan Ling, JovialFeline, jrb0001, jsd1982, Kanar, Kenny Hoxworth, Kevin, Kyrylo Silin, ltem, Markus Hartung, Matija Hustić, matija-hustic, Matthias Mailänder, MatthijsBenschop, Max Ugrumov, michaeldgg2, Micr0Bit, Moritz M., MorMund, Moviuro, Mustafa Alperen Seki, mvdhout1992, N.N,>, Nah, Neth, Nikolay Fomin, NJ, Oliver Brakmann, OmegaBolt, Orb370, Paolo Chiodi, Paul Chote, Paul van Tilburg, Pavel Penev, Pavlos Touboulidis, Peter Antal, Peter Evers, phrohdoh, Pi Delport, pizzaoverhead, psydev, r0b0v, r34ch, Raymond Bedrossian, raz, reaperrr, Remco, Robert Rouhani, RoosterDragon, s1w_, Sam, Scott, sinf, Smittytron, SteelPhase, taryn, teees, teinarss, TheChosenEvilOne, Thijs Waalen, Thomas Christlieb, Tim M, Tinne M., tovl, Trevor Nichols, Tyson Liddell, UberWaffe, Unrud, Wojciech Walaszek, xan2622, yesfish, ytinasni, Zimmermann Gyula

actionremake content commercial original required
Details
Code languages: C, C++
Code licenses: GPL-2.0
Code repositories: xythobuz/OpenRaider.git(since 2013, ), openraider.cvs.sourceforge.net
Code dependencies: OpenAL, OpenGL, SDL2
Build system: CMake
Developers: Carsten Teibes, Terry 'Mongoose' Hendrix II, Thomas Buck
remakesimulation content commercial original required
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: OpenRCT2/OpenRCT2.git(since 2014, )
Build system: CMake
Developers: (220)
73, A,N., A.N, Aaron van Geffen, Adam, Adam Bloom, Adrian Wielgosik, Albert Morgese, Alexander Overvoorde, Andrew, Andy Ford, annoyingdroid, anyc, Aram Kazorian, atmaxinger, AuraSpecs, aw20368, Basssiiie, Ben Johnston, Ben Pye, blackhand1001, Breno Rodrigues Guimarães, Bryan DiLaura, camthesaxman, ceeac, Chanwoong Kim, Chaosmeister, Charles Machalow, Cheetos420, Christian F. Coors, Christian Murphy, Christian Schubert, Cody Jung, Conrad Kostecki, Cory Sanin, Craig Craig, Craig Ward, CraigCraig, Daan de Heij, danidoedel, Daniel Kamil Kozar, Daniel Karandikar, Daniel Trujillo Viedma, Daniël Heres, Dennis Devriendt, Dennis-Z, dennis-z, deurklink, Dom Light, Duncan, DutchRPW, Dániel Tar, Fruitsalad, frutiemax, frutiemax92, Gabriel Guedes, GalBr, GD Park, Gericom, GingerAdonis, Graham Edgecombe, Harry Hopkinson, Harry Lam, Haven Kim, Helio Nunes Santos, Hendrik v. Raven, Henry Cheng, hexdec, Hielke Morsink, hokasha2016, HtotheTML, Hudson Oliveira, irrelevantirreverent, Jackson Davis, James, jensj12, Jeroen Sack, JeroenDStout, Jim, Jim Armstrong, John, Jonathan Haas, Josh Trzebiatowski, Joshua Moerman, Josue Acevedo, Julia Pinheiro, Justin Gottula, Jørn Lomax, Kane, Keatzee, Keith Stellyes, Kevin, Kevin Burke, Krutonium, Kyle Kirbatski, kyphii, Leurak, Linus Unnebäck, LordOfLunacy, LRFLEW, Lucas Åström, lurimax-north, Maciek Baron, Maikel Stuivenberg, MaikelS11, Manuel Vögele, Marco Costa, marcovmun, Margen67, Marijn van der Werf, Martin Černáč, Mathias Gibbens, Matt, Matt Souza, Matte A, Matthias Lanzinger, Matthias Mailänder, Matthias Moninger, Max, Maximilian Irlinger, MaxMallon, mdbckrtn, Meehoi, Melissa, Michael Steenbeek, Michał Janiszewski, Michiel, Miso Zmiric, mrmbernardi, muemart, Mustapha Elghoul, NathanIkola, nexgenration, Nic, Nicolas Hawrysh, nightroan, Nils Caspar, Olivier Wervers, OpenRCT2 git bot, Osmodium, oystedal, Patrick Wijnings, Paul Sajna, Paweł Bylica, Peter, Peter Froud, Peter Hill, Peter Ryszkiewicz, Philip Goto, Phillip Walters, Piotr Kubaj, pizza2004, pkubaj, platipo, Pulkit, quale, Raymond Zhao, Richard Fine, Richard Jenkins, Richard Qian, Rik Smeets, Robert Jordan, Rodbourn, RollingStar, Romain, rpstester, Ruben De Smet, Rune Laenen, Ryan, Ryan Dupke, Saad Rehman, Sadret, Sam Atkins, Sam Horn, seanmajorpayne, Severin Paul Höfer, Sid, Sidney, Sijmen, Silent, Simon J, skdltmxn, Skip, Sophie Wallace, spacek531, Stephan Spengler, Ted John, TELK, TheAssassin, Thomas den Hollander, Timmy Weerwag, Tobias Kohlbau, Tom Lankhorst, Tom Parsons, Tom van der Kleij, Tomas Dittmann, TomasZilinek, Tomáš Žilínek, Trevor Harkness, Trevor Wilson, Tulio Leao, Umdlye, Vinicius Sa, w-flo, William Wallace, Wirlie, wolfreak99, X123M3-256, Xkeeper, xp4xbox, xperia64, Yannic Geurts, Yaroslav Tretyakov, YJSoft, zaxcav, ZeeMaji, ZeeMajora, Íkorni, Łukasz Pękalski, ζeh Matt

Homepage: openroadsgame.com
Inspiration: SkyRoads
Play online: openroadsgame.com
Details
Code languages: TypeScript, JavaScript
Code licenses: MIT
Code repositories: anprogrammer/OpenRoads.git(since 2014, )
Code dependencies: WebGL
Assets licenses: ?
Developer: Daniel Church
strategy isometric real-time
Details
Code languages: Python
Code licenses: GPL-2.0
Code repositories: osgames/openrts.git(since 2019, )
Code dependencies: PGU, pygame
Developers: Andreas Røsdal, Rtsfan
remakestrategy multiplayer Online + LAN real-time
Details
Code languages: C#, Lua
Code licenses: GPL-3.0
Code repositories: Dzierzan/OpenSA.git(since 2019, )
Code dependencies: OpenRA
Developers: abcdefg30, Dzierzan, Matthias Mailänder, Paul Chote, Paweł Dzierżanowski, phrohdoh, taryn, Zimmermann Gyula
Details
Code languages: JavaScript
Code licenses: GPL-3.0
Code repositories: nicholas-ochoa/OpenSC2K.git(since 2018, )
Code dependencies: Phaser, WebGL
Developer: Nicholas Ochoa
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: fabianschuiki/OpenSkyscraper.git(since 2010, )
Build system: CMake
Developers: Fabian Schuiki, Hoshi, matthewharvey
Details
Code languages: PHP
Code licenses: GPL-3.0
Code repositories: delight-im/OpenSoccer.git(since 2014, )
Developers: cosme12, Diego Lanciotti, Marco
puzzle clone content open
Details
Code languages: C++
Code licenses: Unlicense
Code repositories: mdodis/OpenSolomonsKey.git(since 2019, )
Build system: Custom
Developers: immortalx74, John Dodis, Michael Dodis
remake first-person sandbox shooter
remake content commercial original required
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: ObKo/OpenSR.git(archived, since 2011, )
Code dependencies: OpenAL, Qt
Build system: CMake
Developers: Alexander Akulich, Dmitrii Kosarev, Kakadu, Konstantin Oblaukhov
puzzleremake content open
Homepage: sergiou87/open-supaplex
Inspiration: Supaplex
Details
Code languages: C
Code licenses: GPL-3.0
Code repositories: sergiou87/open-supaplex.git(since 2020, )
Code dependencies: SDL2
Build system: Make
Developers: Alexey Sokolov, Cameron Cawley, Cillié Malan, mills32, MrHuu, Román Jiménez, Sergio Padrino
remake content commercial original required
Details
Code languages: C, C++
Code licenses: GPL-2.0
Code repositories: OpenSWE1R/openswe1r.git(since 2017, ), james-knippes/openlgr.git
Code dependencies: OpenGL, SDL2
Build system: CMake
Developers: Jannik Vogel, Tobias Taschner
remake content commercial original required
Details
Code languages: C
Code licenses: GPL-3.0
Code repositories: stople/OpenTitus.git(since 2012, )
Code dependencies: SDL
Developers: Eirik Stople, stople
remakesimulation content commercial
Details
Code languages: C#
Code licenses: MIT
Code repositories: ThemeParkWorld/OpenTPW.git
Homepage: benjaminfoo/OpenTriad
Inspiration: Triple Triad
Details
Code languages: Java
Code licenses: GPL-3.0
Code repositories: benjaminfoo/OpenTriad.git(since 2015, )
Build system: Gradle
Developer: Benjamin Fuu
Homepage: LazyDuchess/OpenTS2
Inspiration: The Sims 2
Details
Code languages: C#
Code licenses: MPL-2.0
Code repositories: LazyDuchess/OpenTS2.git(since 2022, )
Code dependencies: Unity
Developers: Ammar Askar, berylliumquestion, Nahuel Rocchetti, riperiperi
remakesimulation content original possible + open
Details
Code languages: C
Code licenses: GPL-2.0
Code repositories: opentyrian/opentyrian.git(since 2020, )
Code dependencies: SDL
Developers: Carl Reinke, schmerm, Stephan T. Lavavej, Yuri Kunde Schlesner
actionarcaderemake content open multiplayer Online + LAN shooter
Details
Code languages: C
Code licenses: GPL-2.0
Code repositories: KScl/opentyrian2000.git(since 2020, )
Build system: Make
Developers: Carl Reinke, Kaito Sinclaire, schmerm, Stephan T. Lavavej, Yuri Kunde Schlesner
remakestrategy content commercial real-time
Homepage: www.openvic.com
Inspiration: Victoria II
Details
Code languages: C++, GDScript
Code licenses: GPL-3.0
Code repositories: OpenVicProject/OpenVic.git
Code dependencies: Godot
actionremake content commercial
Details
Code languages: C#
Code licenses: ?
Code repositories: clashbyte/openvice.git(since 2016, )
Build system: VisualStudio
Developers: Mats Vederhus, Mikhail Popov
remakestrategy content commercial real-time
Details
Code languages: Go, C
Code licenses: GPL-3.0
Code repositories: andreas-jonsson/openwar.git(since 2016, )
Developer: Andreas T Jonsson
Details
Code languages: PHP
Code licenses: LGPL-3.0
Code repositories: ihofmann/open-websoccer.git(since 2014, )
Developer: Ingo Hofmann
remakestrategy turn-based
action clone content open
Details
Code languages: C#
Code licenses: GPL-3.0
Code repositories: Evilpersonwithnosoul/OpenYandere.git(since 2018, )
Code dependencies: Unity
Developer: HardlyACoolPerson
strategy turn-based
Details
Code languages: C++
Code licenses: GPL-2.0
Code repositories: osgames/kursk.git(since 2018, )
Developer: Kalman Andrasi
remake content open
Details
Code languages: C++, GDScript
Code licenses: GPL-3.0
Code repositories: OpMonTeam/OpMon.git(since 2020, ), OpMonTeam/OpMon-Data.git @add(since 2018, )
Code dependencies: SFML
Assets licenses: CC-BY-SA, CC-BY
Build system: CMake
Developers: Aerzia, Bobor-dev, Cyrielle, Ethan_Charrier, Jonny Paton, Kévin Bernard-Allies, Michael Vetter, Navet56, Olivier Grech
arcade clone
Details
Code languages: C++
Code licenses: GPL-2.0
Code dependencies: OpenGL, SDL
Homepage: bni.github.io/orbium
Inspiration: Log!cal
Details
Code languages: JavaScript
Code licenses: GPL-2.0
Code repositories: bni/orbium.git(since 2010, )
Developer: Björn Nilsson
remakestrategy content commercial original required
Details
Code languages: Go
Code licenses: MIT
Code repositories: code.ur.gs/lupine/ordoor.git
adventure clone
Details
Code languages: Fortran
Code licenses: ISC
Details
Code languages: C#, Java
Code licenses: GPL-2.0
Code repositories: osgames/orient.git(since 2018, )
Build system: Visual Studio, Ant
Developer: Michael Kriegel
Details
Code languages: CoffeeScript
Code licenses: GPL-2.0
Code repositories: stephank/orona.git(archived, since 2010, )
Developer: Stéphan Kochen
Details
Code languages: C++
Code licenses: GPL-3.0
Code repositories: dulsi/ostrichriders.git(since 2016, )
Build system: Make
Developers: Dennis Payne, dulsi, Rémi Verschelde
music clone content open
Details
Code languages: C#
Code licenses: MIT
Code repositories: ppy/osu.git(since 2014, )
Code dependencies: .NET
Developers: (302)
_ltn, Acid Chicken (硫酸鶏), Adam Baker, Adonais Romero González, Aergwyn, aitani9, Akash Mozumdar, Albert Tang, Albie, Alchyr, Alden Wu, Alex, Alex Amadori, AlFas, alice isabel, alikindsys, alix, alula, Andrei Baciu, Andrei Zavatski, Andrew Hong, andy, anellie, Angela Zhang, apollo, azutake, B3nn1, Badewanne3, BananeVolante, Bartłomiej Dach, Bastian Pedersen, Berkan Diler, BlauFx, Brandon Dong, C0D3 M4513R, cdwcgt, CenTdemeern1, Charlie, Charlotte Herngreen, chayleaf, Christian Kamphausen, Christine Chen, ckie, clayton, Clément Burgelin (Zyf), Cootz, Crafti, Craftplacer, Damnae, Dan Balasescu, Daniel Kirschten, Dao Heng Liu, Darius, Darius Wattimena, David Paiva, David Zhao, Dawid Kraiński, Dawid Sośnia, Dean Herbert, default0, Derrick Timmermans, Desconocidosmh, Detze, Dragicafit, Drew DeVault, Drezi126, DTSDAO, Dylan Nantz, ekrctb, Elvendir, emu1337, Endrik, Fabian L, Fabian Lindgren, Feodor0090, Fire937, Firmatorenio, Fluxie, frankhjwx, FreezyLemon, Fukashi13, Fyodor Ryzhov, Gabe Livengood, Gagah Pangeran Rosfatiputra, Ganendra Afrasya, Givikap120, Grrum, Gyoshi, Hanamuke, Henry Lin, HiddenNode, HoLLy, Huo Yaoyuan, Ibby, iilwy, ilsubyeega-desu, Integer, Isaac Andrews, its5Q, Ivan Pavluk, Jack Boswell, Jack Lee, Jack Scotson, JackLee9355, Jacob, Jacob Odgård Tørring, Jai Sharma, James, James Wilson, James58899, Jamie Taylor, Jamieson Berida, Jan Jurzitza, Jarosław Zgierski, Jason Won, Jay Lawton, Jayden, Jesse Myers, Jessica Meng, Jihoon, Jihoon Yang, JimmyC7834, John Biddle, John Neijzen, Joppe27, jorolf, Joseph Madamba, Joseph-Ramos-CMU, Josh, Joshua Hegedus, Justin, Justus Tumacder, jvyden, KaisoBits, Kaleb, kamp, Keijia, Kelvin, Kenny Sun, Khangaroo, KoziLord, kyekiller, Kyle Chang, Laica, LastExceed, LeeMustache, Leon Gebler, Liam DeVoe, LiangXiang Shen, Lily, Loreos7, Lucas A., Lucas Arriesse, LukynkaCZE, M0RGaming, maarvin, Maciej Sołtys, MafinBoy, Magnus-Cosmos, Malox10, Marco Stephan, maromalo, Martin, Mateusz, MATRIX-feather, Matěj Černický, Max, Max Hübner, Maximilian Kruse, MBmasher, McEndu, Mikal S., Mikal Stordal, Mike Will, MillhioreF, miterosan, MK56, molneya, Morguldir, morguldir, Moritz Bender, n4b3l, Nabile Rahmani, Naeferith, NaiPofo, nanashi, Nao, naoey, Nathan, Nathan Alo, Nathan Du, Naxess, Noah M., Nostril, NotGumballer91, nwabear, O Thiago, OAO, ocboogie, odgaard, OliBomby, Olivier Schipper, Olle Kelderman, Ondřej Vajďák, Opelkuh, OpenSauce, Owen Young, Pariring, Pascal Pomper, Pasi, Pasi4K5, Patrick Andersson, Paul Teng, Pedro Montes Alcalde, PercyDan, Pereira Matthieu, pfg, phos, Piotrek Brzeziński, PM-CS, Poliwrath, Power Maker, Poyo, ProgrammaticNajel, ProTheory8, QuantumSno, qwewqa, recapitalverb, RedMindZ, rednir, Remie Richards, Rizon, RizonFTW, Robin Avery, Rodrigo Pina, rogerqcify, Ron B, Ronnie, Ronnie Moir, rootcan, RORIdev, roridev, Roxie Wattz, Ruki, rushii, Ryan Zmuda, Salman Ahmed, Samuel Cattini-Schultz, Samuel Huang, Santeri Nogelainen, Sebastian Krajewski, Semro, Seth, sh0ckR6, Shane Woolcock, Shawdooow, Shivam, smallketchup82, Sofia Lindgren, solstice23, Spooghetti420, StanR, Stedoss, su, Sunghwan Bang, Susko3, Swekka, Swords, tgi, TheOmyNomy, ThePyrotechnic, Thomas Müller, Thomas Tan, Tib, Tim Nolte, Tim Oliver, timiimit, Tom Arrow, TPGPL, Tyler, UselessToucan, Vidalee, Viktor Rosvall, Vincent Maggioli, VINXIS, Vivi, Vladimir Pavlov, voided, voidedWarranties, vperus, vunyunt, Walavouchey, wildtree, Willy Tu, Wleter, Wooster, Xexxar, Y. T., Yao Chung Hu, yesseruser, Инсур, 파링

role playing multiplayer online + massive
Details
Code languages: C, C++
Code licenses: Custom
Code repositories: jp8900308/other-life.git(since 2015, ), gregoryfenton/other-life.git @add(since 2012, )
Developers: Alexander Gottwald, Felix Janda, Gé Vissers, Joe "Flame" Sullivan, Karol, Paul Broadhead (bluap in EL), Sir-Odie, xaphier
Details
Code languages: Ren'Py
Code licenses: GPL-3.0
Code repositories: qirien/personal-space.git(since 2012, )
Code dependencies: Ren'Py
Developers: Andrea Landaker, Rachel
strategy space
Homepage: ospace
Details
Code languages: Python
Code licenses: GPL-2.0
Code repositories: ospaceteam/outerspace.git(since 2012, ), svn.code.sf.net/p/ospace/code
Code dependencies: pygame
Developers: Aina Melkor, Anderuso, Marek Haičman, Mental, PeS, Qark, Random Chaos, Sindel, Vladimir Meister
remakesimulation content commercial original required
Details
Code languages: C++
Code licenses: 3-clause BSD
Code repositories: OutpostUniverse/OPHD.git(since 2018, )
Build system: Make
Developers: Alex, belgianguy, Brett, cugone, Daniel Stevens, Inglonias, Leeor Dicker, matt-handy, Robert Toth
arcade content open space
Details
Code languages: C
Code licenses: GPL-2.0
Assets licenses: ?
Developer: Linley Henzell
action content commercial multiplayer Split-screen + Co-op official original required
Homepage: WolfireGames/overgrowth
Inspiration: Overgrowth
Details
Code languages: C, C++
Code licenses: Apache-2.0
Code repositories: WolfireGames/overgrowth.git(since 2022, )
Build system: CMake
Developers: Max Bo Johan Danielsson, Neal Gompa (ニール・ゴンパ), redruin1, Stephan Vedder

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