awesome-sourceports

awesome-sourceports

List of OSS reimplementations of existing games.

Sorted by original project name

Project	Original	Status	Language	License	Asset Requirement	Extra
New RAW	Another World	2014	C++	GPLv2	Original Assets Required
Arx Libertalis	Arx Fatalis	Active 2024	C++	GPLv3	Original Assets Required
Bermuda Syndrome	Bermuda Syndrome	2019	C++	???	Original Assets Required
xBaK	Betrayal at Krondor	Alpha 2022	C++	GPLv3	Original Assets Required
cdogs-sdl	C-Dogs	Active 2025	C	GPLv2	Free Assets Supplied
augustus	Caesar III	Active 2025	C	AGPLv3	Original Assets Required	'julius' fork
CaesarIA	Caesar III	2016	C++	GPLv3	Original Assets Required
julius	Caesar III	Active 2025	C	AGPLv3	Original Assets Required
Carlos	Carlos	2019	C	???	Original Assets Required
CatacombSDL	Catacomb II	2014	C	GPLv2	Original Assets Required
NXEngine	Cave Story	2014	C++	GPLv3	Original Assets Required
openredalert	Command & Conquer Red Alert	2010	C++	GPLv2	Original Assets Required
FreeRA	Command & Conquer Red Alert	Alpha 2013	C++	GPLv2	Original Assets Required
FreeCNC	Command & Conquer Tiberian Dawn	Alpha 2014	C++	GPLv2	Original Assets Required
c1-launcher	Crysis	2024	C++	???	Original Assets Required
D2X-XL	Descent 1 + 2	2021	C++	PD	Original Assets Required
DXX-Rebirth	Descent 1 + 2	Active 2025	C++	License	Original Assets Required
devilutionX	Diablo 1	Active 2025	C++	License	Original Assets Required
freeablo	Diablo 1	Dead 2023	C++	GPLv3	Original Assets Required
chocolate-doom	Doom I	Active 2025	C	GPLv2	Original Assets Required
RigelEngine	Duke Nukem II	Active 2024	C++	GPLv2	Original Assets Required
EDuke32	Duke Nukem 3D	Active 2024	C++	GPLv2	Original Assets Required
Dune Legacy	Dune II	Active 2024	C++	GPLv2	Original Assets Required
Jactorio	Factorio	2022	C++	License	Free Assets Supplied
f2bgl	Fade To Black	2018	C++	???	Original Assets Required
fallout1-ce	Fallout 1	Active 2025	C++	License	Original Assets Required
fallout2-ce	Fallout 2	Active 2025	C++	License	Original Assets Required	Mod support
Falltergeist	Fallout 2	2022	C++	GPLv3	Original Assets Required
REminiscence	Flashback	2025	C++	???	Original Assets Required
FS2Open 1 2	FreeSpace 2	Active 2025	C++	License	Original Assets Required	See 1
carnage3d	Grand Theft Auto 1	2022	C++	MIT	Original Assets Required
openrw	Grand Theft Auto III	Active 2025	C++	GPLv3	Original Assets Required
re3	Grand Theft Auto III	Archived 2022	C++	???	Original Assets Required
SanAndreasUnity	Grand Theft Auto San Andreas	2022	C# (Unity)	MIT	Original Assets Required
The-Great-Escape-in-C	The Great Escape	Active 2024	C	???	Free Assets Supplied
FHeroes2	Heroes of Might & Magic II	Beta 2018	C++	GPLv2	Original Assets Required
VCMI	Heroes of Might & Magic III	Active 2025	C++	GPLv3	Free Assets Supplied	Mod support
uhexen2	Hexen II	Active 2025	C	GPLv2	Original Assets Required
Igor	Igor: Objetivo Uikokahonia	2017	C++	???	Original Assets Required
ja2-stracciatella	Jagged Alliance 2	Active 2025	C++	License	Original Assets Required
openjazz	Jazz Jackrabbit	Active 2024	C++	GPLv2	Original Assets Required
JediAcademyLinux	Jedi Knight: Jedi Academy	Archived 2024	C++	GPLv2	Original Assets Required
JediOutcastLinux	Jedi Knight II: Jedi Outcast	Archived 2024	C++	GPLv2	Original Assets Required
kickoff	Kick Off 2	Active 2024	Java	MIT	Free Assets Supplied
openKB	King's Bounty	Alpha 2023	C	GPLv3	Free Assets Supplied
1oom	Master of Orion (1993)	2018	C	GPLv2	Original Assets Required
opennox	Nox	Active 2024	C, Go	GPLv3	Original Assets Required
SDLPoP	Prince of Persia	Active 2025	C	GPLv3	Free Assets Supplied
iortcw	Return to Castle Wolfenstein	Active 2024	C	GPLv3	Original Assets Required
Return to the Roots	Settlers II, The	Active 2025	C++	GPLv2	Original Assets Required
Micropolis	SimCity Classic	Active 2024	Multiple	License	Original Assets Required, Graphics
donut	Simpsons: Hit & Run	2021	C++	GPLv3	Original Assets Required
SDL Sopwith	Sopwith	Active 2024	C	GPLv2	Free Assets Supplied
The Ur-Quan Masters	Star Control 2	Beta 2024	C	GPLv2	Free Assets Supplied, Graphics
STARGUS	Starcraft	Active 2024	C++	GPLv2	Original Assets Required
Ultimate Stunts	Stunts	Alpha 2017	C++	GPLv2	Free Assets Supplied
open-supaplex	Supaplex	Active 2024	C	License	Assets Supplied
FreeSynd	Syndicate	Alpha 2025	C++	GPLv3	Original Assets Required
Shockolate	System Shock	2023	C	GPLv3	Original Assets Required
OpenTESArena	TES I: Arena	Active 2025	C++	MIT	Original Assets Required, Free 1 2 3
daggerfall-unity	TES II: Daggerfall	Active 2025	C# (Unity)	MIT	Original Assets Required, Free
OpenMW	TES III: Morrowind	Active 2025	C++	GPLv3	Original Assets Required	Mod support
CorsixTH	Theme Hospital	Active 2025	C++, Lua	License	Original Assets Required	Editor
TOMB5	Tomb Raider: Chronicles	2021	C	MIT	Original Assets Required
OpenTTD	Transport Tycoon Deluxe	Active 2025	C++	GPLv2	Free Assets Supplied	Mod support
opentyrian	Tyrian	C	Active 2024	GPLv2	Free Assets Available (README)
xu4	Ultima IV	Active 2025	C++	GPLv3	Original Assets Required
Nuvie	Ultima VI	Beta 2015	C++	GPLv2	Original Assets Required
exult	Ultima VII	Active 2025	C++	GPLv2	Original Assets Required
WAR1GUS	Warcraft: Orcs and Humans	Active 2024	C++	GPLv2	Original Assets Required
WARGUS	Warcraft 2	Active 2024	C++	GPLv2	Free Assets Available: link
Privateer Gemini Gold	Wing Commander Privateer	2013	C++	GPLv2	Free Assets Available
ECWolf	Wolfenstein 3D	Active 2023	C++	GPLv2	Original Assets Required
Wolf4SDL	Wolfenstein 3D	Active 2024	C	GPLv2	Original Assets Required
OpenXcom	X-Com: UFO Defense, X-COM: Terror from the Deep	Active 2025	C++	GPLv3	Original Assets Required
Zod Engine	Z	Beta 2018	C++	GPLv3	Free Assets Available

Independent game engines / multigame engines

Project	Status	Language	License	Extra
Abysmal	Pre-Alpha 2015	C++	GPLv2	System Shock 1, Ultima Underworld
Aleph One	Active 2025	C++	GPLv3	Implements Marathon Infinity and Marathon 2 engines
BStone	Active 2025	C++	License	Implements Blake Stone series
BuildGDX 1 2	Active 2025	Java	GPLv3	Build Engine
CatacombGL	Active 2025	C++	GPLv3	Implements Catacomb game series
Commander Genius	Active 2025	C++	License	Implements Commander Keen Series
darkplaces	Active 2025	C	GPLv2	id Tech 2
Doom Legacy	Active 2025	C++	GPLv2	id Tech 1
Doomsday	Active 2024	C++	GPLv3/LGPLv3	id Tech 1
erampage	Dead 2010	???	GPLv2	Redneck Rampage series
GemRB	Active 2025	C++	GPLv2	Implements Infinity Engine games
GZDoom	Active 2025	C++	GPLv3	id Tech 1
ioquake3	Active 2024	C	GPLv2	id Tech 3
mrboom-libretro	Active 2024	C	MIT	Multiplayer Bomberman clone
openage	Active 2025	C++, Python	GPLv3	Age of Empires games
openclonk	Active 2025	C++	License	Terraria clone
OpenEnroth	Active 2024	C++	LGPLv3	Might and Magic 6 7 8 game engine
OpenGOAL	Active 2025	CL, C++	ISC	Jak & Daxter Series engine
OpenJK	Active 2024	C++	GPLv2	Implements Jedi Series
OpenLara	Active 2024	C++	BSD (2C)	Implements Tomb Raider Engines
OpenMB	Active 2024	C# (Ogre3d)	GPLv3	Implements Mount & Blade Series
OpenRA	Active 2025	C#	GPLv3	Implements Dune 2000, Tiberian Dawn, Red Alert, Tiberian Sun
OpenRaider	Active 2024	C++	GPLv2	Implements Tomb Raider Engines
OpenTomb	Pre-Alpha 2018	C++	LGPLv3	Implements Tomb Raider Engines
OpenXRay	Active 2025	C++	License	STALKER engines
Raze	Active 2025	C++	License	Build Engine
R.E.L.I.V.E	Active 2025	C++	???	Abe's Oddysee / Exoddus
ResidualVM	Archived 2024	C++	Licenses	See link
ScummVM	Active 2025	C++	GPLv3	See link
Seven Kingdoms 1 2	Active 2024	C++	GPLv2
storm-engine	Archived 2023	C++	GPLv3	Game engine behind Sea Dogs, Pirates of the Caribbean and Age of Pirates
Stratagus	Active 2024	C++	GPLv2	Implements Blizzard RTS
taisei	Active 2024	C	License	Touhou clone
TRX	Active 2025	C	GPLv3	Implements Tomb Raider Engines
Xash3D FWGS	Active 2025	C	???	Implements Gold Source
yamagi Quake II	Active 2024	C	License	id Tech 2.5
Zandronum	Active 2025	C++	License	id Tech 1
ZeldaClassic	Active 2024	C++	GPLv3	Topdown TLoZ engine and editor

Officially open-sourced games

Project	Status	Language
Abuse	2011	C++
Airstrike	2003	C
Aliens Vs Predator	2017	C
Captain Blood	2024	C++
FarCry 1	2024	C
Forsaken	2024	C
Rise of the Triad	2012	C

Free implementations of assets

• Freedoom 1 2 - Doom
• blasphemer - Heretic
• Zauberer - Hexen