Daimonin

Inspired game: Atrinik

Dance Dance Revolution

Inspired games: Performous, StepMania

Dangerous Dave in the Haunted Mansion

Inspired game: Dangerous Dave 2: Modification Edition

Dark Forces

Inspired games: The Force Engine, XL Engine

Dark Reign: The Future of War

Inspired game: OpenDR

Deadly Rooms of Death

Inspired game: HyperRogue

Death Rally

Inspired games: dRally, Dreerally

Deathchase

Inspired game: Deathchase 3D

Deathlord

Inspired game: Deathlord Relorded

Decision in the Desert

Inspired game: Command Series Engine

Defender

Inspired games: Defendguin, Word War vi

Deflektor

Inspired games: Deflektor X4, Mirror Magic

Delver

Inspired game: DelverEngine

Descent

Inspired games: D2X-XL, DXX-Rebirth

Descent II

Inspired games: D2X-XL, DXX-Rebirth

Destructo

Inspired game: Return of Dr. Destructo

Diablo

Inspired games: Devilution, DevilutionX, DGEngine, Flare, freeablo, Summoning Wars

Diablo II

Inspired games: Diablerie, OpenD2, OpenDiablo2, Riiablo

Diabolika 2: The Devil's Last Stand

Inspired game: Diabolika

Digger

Inspired games: CAVEZ of PHEAR, Digger Remastered, xdigger

Dink Smallwood

Inspired games: Dink Smallwood HD, GNU FreeDink

Dogs of War

Inspired game: openDOW

Dominion

Inspired game: OpenDominion

Doom

Inspired games: Chocolate Doom, Classic RBDoom 3 BFG, Do It Yourself Doom With SDL, DOOM, Doom Legacy, DOOM Retro, DOOM-iOS, Doomsday Engine, DRL, EDGE, Freedoom, Gloomy Dungeons, Gloomy Dungeons 2, GZDoom, Mocha Doom, Odamex, PrBoom+, PsyDoom, SLADE, The Eternity Engine, Yet Another Doom Clone, Zandronum, ZDoom

Doom 3

Inspired games: Classic RBDoom 3 BFG, dhewm3, RBDOOM-3-BFG

Doom 64

Inspired game: Doom64EX

Doom II

Inspired games: Doom Legacy, DOOM Retro, DOOM-iOS, Doomsday Engine, Freedoom, GZDoom, Mocha Doom, Odamex, PrBoom+, Zandronum, ZDoom

Double Dragon

Inspired game: OpenBOR

Dragon Wars

Inspired game: Turn of War

DragonBall

Inspired game: ZEQ2 Lite

Drakan: Order of the Flame

Inspired game: OpenDrakan

Driver 2

Inspired game: REDriver2

Drugwars

Inspired games: Dope Wars, Prescription Wars

Dstroy

Inspired game: Dstroy

Duck Hunt

Inspired games: Duck Hunt JS, Duck Rehunt

Duke Nukem

Inspired games: Dave Gnukem, Freenukum

Duke Nukem 3D

Inspired games: Chocolate Duke3D, Duke3D, Duke3d_w32, DukeGDX, EDuke32, JFDuke3D, Raze, Rednukem, xDuke

Duke Nukem II

Inspired games: Duke 2 Reconstructed, Rigel Engine

Dune 2

Inspired games: Arrakis, Dune Dynasty, Dune II - The Maker, Dune Legacy, OpenDUNE, OpenHV

Dune 2000

Inspired game: OpenRA

Dungeon Crawl Stone Soup

Inspired game: Javelin

Dungeon Keeper

Inspired games: Goblin Camp, KeeperFX, OpenDungeons

Dungeon Keeper 2

Inspired games: GLKeeper (GrimLands Keeper), KeeperRL, OpenKeeper

Dwarf Fortress

Inspired games: DwarfCorp, Goblin Camp, Project Porcupine, Veloren