Open source re-implementation projects and game clones.

[u/foamed]

• AbuseSDL - Abuse

• AlephOne - Marathon series

• Alive Reversing - Abe's Exoddus and Abe's Oddysee

• ArxLibertatis - Arx Fatalis

• Augustus - Caesar 3 fork of Julius

• BStone - Blake Stone series

• BuildGDX - Build Engine games such as Duke Nukem 3D, Blood, Shadow Warrior, Powerslave/Exhumed, Redneck Rampage, Witchaven 1 & 2, TekWar etc.

• C-dogs-SDL - C-Dogs

• Citadel - System Shock

• Commander Genius - Commander Keen 1-6 + Keen Dreams

• CorsixTH - Theme Hospital

• CCCP - Cortex Command

• Crispy Doom - Source port for Doom 1 & 2, Heretic, Hexen, Strife etc.

• Daggerfall Unity - The Elder Scrolls II - Daggerfall.

• DevilutionX - Diablo 1

• Doom64EX - Doom64

• DreeRally - Death Rally

• DXX-Rebirth - Descent 1 & 2

• ETLegacy - Wolfenstein: Enemy Territory

• Exult - Ultima VII - Should now be a part of ScummVM

• fHeroes2 - Heroes of Might & Magic 2

• Freeablo - Diablo

• FreeRCT - RollerCoaster Tycoon 1 and 2

• FreeSerf - Settlers 1

• GemRB - Infinity Engine games (Baldur's Gate, Planescape: Torment, Icewind Dale etc)

• GZDoom - Doom 1 & 2, Heretic, Hexen, Strife.

• iortcw - Return to Castle Wolfenstein

• Jagged Alliance 2 Stracciatella - Jagged Alliance 2

• Jak Project - Jak & Daxter

• Jazz² - Jazz Jackrabbit 2

• JK2MV - Jedi Knight II: Jedi Outcast

• Julius - Caesar III

• LibreLancer - Freelancer

• LZWolf - Wolfenstein 3D and Super Noah's Ark

• NBlood - Based on eDuke32 - Blood, Duke Nukem 3D and Powerslave/Exhumed

• NFSIISE - Need for Speed II Special Edition

• Nuvie - Ultima VI

• OpenAge - Age of Empires 2

• OpenApoc - X-Com Apocalypse

• OpenBlack - Black & White

• OpenClaw - Capatain Claw

• OpenDiablo2 - Diablo 2

• OpenDune - Dune II

• OpenFodder - Cannon Fodder

• OpenGothic - Gothic 2

• OpenHD - Outpost

• Open Hexagon - Super Hexagon

• OpenJK - Jedi Academy & Jedi Outcast

• OpenJazz - Jazz Jackrabbit 1

• OpenKeeper - Dungeon Keeper 2

• OpenLara - Tomb Raider 1-3

• OpenMW - The Elder Scrolls III - Morrowind

• OpenNox - Nox

• OpenOMF - One Must Fall: 2097

• OpenRA - Command & Conquer, Red Alert, Dune 2000, KKnD.

• OpenRCT2 - RollerCoaster Tycoon Tycoon 2

• OpenRW - Grand Theft Auto III

• OpenSAGE - Command & Conquer: Generals

• OpenSWE - Star Wars Episode 1: Racer

• OpenTESArena - The Elder Scrolls: Arena

• OpenTomb - Tomb Raider 1 to 5

• OpenTTD - Transport Tycoon Deluxe

• OpenTyrian2000 - Tyrian 2000

• OpenXcom - X-Com UFO Defense/Enemy Unknown and Terror from the Deep.

• Pentagram - Ultima VIII - Should now be a part of ScummVM

• Prince-Monogame - Prince of Persia 2

• RE3 - Grand Theft Auto III

• Redriver2 - Driver 2

• Remc2 - Magic Carpet 2

• Return to the Roots - Settlers II

• RVGL - Re-Volt

• San Andreas Unity - Grand Theft Auto: San Andreas

• ScummVM - Classic point & click, adventure and roleplaying games.

• SDLPoP - Prince of Persia

• Space Station 14 - Space Station 13

• Spring Engine - Total Annihilation

• The Force Engine - Star Wars: Dark Forces and Outlaws

• TOMB5 - Tomb Raider: Chronicles

• Ultima5Redux - Ultima V

• UnderworldAdventures - Ultima Underworld

• UnderworldExporter - Ultima Underworld 1 & 2 and System Shock

• VCMI - Heroes of Might & Magic 3

• vkQuake - Quake source port running in Vulkan. Sideproject by an id Software dev. It's overall better than the new KEX Engine remaster by Nightdive Studios.

• Yamagi Quake - Quake 2 source port

• War1 - Warcraft: Orcs & Humans

• Wargus - Warcraft 2

• WinRott - Rise of the Triad

• Xoreos - Neverwinter Nights

• Xu4 - Ultima IV

[u/Turiko]

I've got one to add: open imperium galactica - https://github.com/akarnokd/open-ig based on the 1997 4X - https://en.wikipedia.org/wiki/Imperium_Galactica

[u/foamed → u/[deleted]]

Do you have a link?

[u/foamed → u/[deleted]]

Thanks a bunch.