Actively maintained open-source game remakes.
Most games require original asssets. The ones not requiring paid assets are marked with π΄.
If you are also interested in clones and similar games (0 A.D. etc.), take a look at Open Source Game Clones.
- Carnage3D - Reimplementation of Grand Theft Auto.
- donut - Reimplementation of The Simpsons: Hit & Run in modern C++ and modern OpenGL.
- OpenJK - Community effort to maintain and improve Jedi Academy and Jedi Outcast by Raven Software.
- OpenLara - Classic Tomb Raider open-source engine.
- OpenMB - Role-playing game engine for Taleworlds' Mount&Blade Series.
- OpenRW - A cross-platform, open source re-implementation of Rockstar Games' Grand Theft Auto III.
- OpenTomb - Original Tomb Raider 1-5 experience with contemporary updates, features and additions.
- re3 - Reversed source code for GTA III and GTA: Vice City.
- remc2 - Reverse engineering of Magic Carpet 2 from Assembler.
- Rigel Engine - Modern reimplementation of the classic DOS game Duke Nukem II in C++.
- San Andreas Unity - Reimplementation of GTA: San Andreas game engine in Unity.
- TOMB5 - Tomb Raider: Chronicles disassembly translated to C source code.
- TR1X - Open source implementation of the classic Tomb Raider I game.
- ScummVM - Allows you to run certain classic graphical point-and-click adventure games such Maniac Mansion and Monkey Island.
- Barbarian - Open-source clone of Barbarian: The Ultimate Warrior.
- C-Dogs SDL - Classic overhead run-and-gun game. π΄
- Mr.Boom - 8 player Bomberman clone for RetroArch/Libretro.
- OpenClonk - Multiplayer action game where you control small and nimble humanoids.
- OpenJazz - Free, open-source version of the classic Jazz Jackrabbitβ’ games.
- Open Kick-Off - Rewriting attempt of the cult football game Kick Off 2. π΄
- OpenTyrian - An open-source port of Tyrian from Turbo Pascal to C. π΄
- Taisei - Fan-made, open-source clone of the Touhou series. π΄
- The Great Escape in C - Classic ZX Spectrum game The Great Escape in portable C. π΄
- Zelda Classic - A game and editing tool that lets you create custom Legend of Zelda quests.
- Allegiance - Allegiance is RTS and FPS Space Combat game.
- BetterSpades - Ace Of Spades open source implementation that runs on older machines.
- BStone - A source port of Blake Stone: Aliens Of Gold and Blake Stone: Planet Strike.
- CatacombGL - Windows source port of Catacomb 3D and the Catacomb Adventure series.
- Chocolate Doom - Source port that is minimalist, historically accurate and includes ports of Heretic and Hexen, and Strife. π΄
- ClassiCube - Minecraft Classic compatible client written in C from scratch. π΄
- Doom Legacy - One of the most popular DOOM source ports, which enhances it with things like TCP/IP networking, OpenGL renderer etc. π΄
- DoomRetro - Classic, refined DOOM source port for Windows PC. π΄
- Doomsday Engine - Source port of id Software's DOOM I/II and Raven Software's Heretic and Hexen. π΄
- DukeGDX - Duke Nukem 3D port.
- ECWolf - Port of Wolfenstein 3D based on Wolf4SDL.
- ezQuake - Combining the features of all modern QuakeWorld clients, ezQuake makes QuakeWorld easier to start and play.
- FreeCS - Free-software re-implementation of Counter-Strike 1.5 running on the FTEQW engine. π΄
- Freedoom - Free software FPS based on the classic DOOM engine. π΄
- FTEQW - FPS Engine for Quake 1, QuakeWorld, Quake 2, Hexen II & Quake III Arena.
- GZDoom - Modder-friendly OpenGL and Vulkan source port based on the DOOM engine. π΄
- Hexen II: Hammer of Thyrion - Cross-platform port of the Hexen II game.
- ioquake3 - The free software FPS engine that can be used to play Quake 3, or make your own game.
- NBlood - Port of the classic FPS Blood.
- Odamex - Online multiplayer DOOM port with a strong focus on the original gameplay while providing a breadth of enhancements. π΄
- OpenSpades - Compatible client of Ace of Spades, a voxel FPS.
- QuakeSpasm - A modern, cross-platform Quake game engine.
- RBDOOM-3-BFG - Doom 3 BFG Edition with soft shadows, cleaned up source, Linux and 64 bit Support.
- RedneckGDX - Port of Redneck Rampage.
- SurrealEngine - The goal of this project is to reimplement enough of the original Unreal Engine to make the Unreal Tournament (UT99) maps playable.
- The Eternity Engine - Advanced DOOM source port. π΄
- The Force Engine - Jedi Engine for modern systems and the games that used that engine - Dark Forces and Outlaws.
- Tyrquake - Libretro port of Tyrquake.
- Yamagi Quake II - Enhanced client for id Software's Quake II with focus on offline and coop gameplay.
- Zandronum - Multiplayer oriented port, based off Skulltag, for Doom and Doom II. Also runs Heretic, Hexen and Strife. π΄
- 2006rebotted - A 2006 RuneScape 2 Emulation Server. π΄
- 2004scape - A free & open-source remake of 2004 era RuneScape 2. π΄
- 2009scape - A free & open-source remake of 2009 era RuneScape 2. π΄
- ACEmulator - A custom, completely from-scratch open source server emulator for Asheronβs Call built on C#. π΄
- FreeSO - Reimplementation of The Sims Online, targetted mainly at mobile devices. π΄
- Meridian 59 - The first 3D MMORPG, released in 1996 and open sourced in 2012. The original codebase for Meridian 59.
- MineClone2 - Stable, moddable & free/libre clone of Minecraft based on the Minetest engine. π΄
- Opengate - Remake of Jumpgate.
- OpenRSC - Open source accurate RuneScape Classic (2001-2003) game server in Java, based on recorded data and videos. π΄
- RSC-C - Rewrite of the RuneScape Classic (2001-2003) game client in portable C. π΄
- RuneLite - Open source Old School RuneScape (OSRS) client. π΄
- Ryzom Core - Ryzom Core contains the whole code (client, server, tools) used to make the commercial MMORPG Ryzom. π΄
- Space Station 14 - Space Station 14 is a revived attempt at a Space Station 13 remake.
- Abyss Engine - Abyss Engine is a game engine designed to run games similar to 2000's style ARPGs such as Diablo II.
- Arx Libertatis - Cross-platform port of Arx Fatalis, a first-person role-playing game.
- Barony - Open source release of Barony.
- BtBuilder - An open source implementation of the Bard's Tale Construction Set.
- Daggerfall Unity - Recreation of Daggerfall in the Unity engine.
- Devilution - Reconstructed form of Diablo's original source code.
- DevilutionX - Diablo build for modern operating systems.
- DGEngine - Implementation of the Diablo game engine.
- Exult - Project to recreate Ultima 7 for modern operating systems.
- Falltergeist - Crossplatform Fallout 2 game engine writen in C++ and SDL.
- Freeablo - Open-source implementation of the Diablo engine.
- FreeFT - Real-time, isometric action game engine inspired by Fallout Tactics.
- GemRB - Portable open-source reimplementation of the Infinity Engine (used by Baldur's Gate, Icewind Dale and more).
- OpenEnroth - Might and Magic VI-VIII engine remake using original data & code.
- OpenGothic - Reimplementation of Gothic 2: Night of the Raven.
- OpenMW - Reimplementation of the Morrowind game engine.
- OpenNox - Collaboration project extending the Nox engine.
- OpenTESArena - Modern engine reimplementation of The Elder Scrolls: Arena by Bethesda Softworks.
- OpenVIII - Final Fantasy VIII engine implementation in C#.
- REGoth - An open source reimplementation of zEngine the engine behind Gothic and Gothic II.
- Riiablo - Diablo II remade using Java and LibGDX.
- sfall - A set of engine modifications for the classic game Fallout 2.
- Shockolate - Same great System Shock, new great taste.
- UAlbion - Remake of 1995 Albion.
- WitchavenGDX - Witchaven Java port.
- xoreos - Implementation of BioWare's Aurora engine and its derivatives (used by Neverwinter Nights, The Witcher and more).
- Zelda3 - This is a reverse engineered clone of Zelda 3 - A Link to the Past.
- zorkClone - Reimplementation of the original Zork game developed by Infocom.
- Alive Reversing - Reimplementation of Oddworld: Abe's Exoddus.
- Commander Genius - Modern Interpreter for the Commander Keen Games. π΄
- JazzΒ² Resurrection - Reimplementation of Jazz Jackrabbit 2.
- Lionheart Remake - Java remake of Lionheart Amiga game.
- NXEngine-evo - Rewrite of the masterpiece jump-and-run platformer Doukutsu Monogatari (also known as Cave Story).
- Omnispeak - Reimplementation of Commander Keen in Goodbye Galaxy.
- Prince-Monogame - Monogame implementation of Prince of Persia 2.
- SDLPoP - Port of Prince of Persia, based on the disassembly of the DOS version.
- sm64js - Super Mario 64 reimplementation in JavaScript.
- The Secret Chronicles of Dr. M - Adaptation of Secret Mario Chronicles. π΄
- VVVVV - The source code to VVVVVV.
- Reburn 3 - A work-in-progress open source reimplementation of Burnout 3: Takedown.
- DreeRally - Death Rally engine reimplementation.
- OpenNFS - Attempt to recreate the classic Need for Speed Games (1-6).
- Vangers - Racing/RPG hybrid made open-source by its creators, written in C++.
- Vange-rs - The idea of this project is to replicate the old look and behavior of Vangers, but with native hardware acceleration for the graphics.
- wipEout Rewrite - This is a re-implementation of the 1995 PSX game wipEout. π΄
- DXX-Rebirth - Source port of the Descent and Descent 2 Engines for Windows, macOS, Linux.
- Free Stars: The Ur-Quan Masters - Open source version of the classic Star Control 2.
- FS2Open - FreeSpace2 Source Code Project.
- Librelancer - Reimplementation of the 2003 space game Freelancer.
- Ancient Beast - Spiritual successor to Heroes of Might and Magic III focusing on combat; matched based eSport.
- Antares - Remake of Ares, a tactical space combat game.
- CivOne - Implementation of Sid Meier's Civilization.
- CorsixTH - Clone of Theme Hospital with support for modern operating systems, high resolutions and much more.
- Cortex Command Community Project Source - Community-driven effort to continue the development of Cortex Command.
- fheroes2 - Free implementation of Heroes of Might and Magic II game engine.
- FreeCol - Turn-based strategy game based on the old game Colonization.
- GLSMAC - Unofficial open-source OpenGL/SDL2 reimplementation of Sid Meier's Alpha Centauri ( + Alien Crossfire ).
- Jagged Alliance Stracciatella - Makes Jagged Alliance 2 available on a wide range of platforms.
- Julius - Reimplementation of Caesar III.
- KaM Remake - RTS game remake of Knights and Merchants written in Delphi from scratch.
- KeeperFX - Open source remake and Fan Expansion of Dungeon Keeper.
- KeeperRL - Roguelike dungeon builder inspired by Dwarf Fortress.
- openage - Clone of the Age of Empires II engine.
- OpenApocalypse - Rebuild of the X-COM: Apocalypse engine.
- openblack - Reimplementation of Black & White.
- OpenDUNE - Recreation of the popular game Dune II.
- Open Fodder - Open-source implementation of Cannon Fodder.
- OpenHV - Open-source implementation of Hard Vacuum. π΄
- OpenLoco - Reimplementation of Chris Sawyer's Locomotion.
- Open Panzer - HTML5 Panzer General 2. π΄
- OpenRA - Implementation of the Red Alert engine using .NET/mono and OpenGL. Runs on Windows, Linux and macOS.
- OpenRCT2 - Recreation of RollerCoaster Tycoon 2.
- OpenSAGE - C# reimplementation of SAGE, the game engine used by a bunch of EA Pacific games, including Command & Conquer: Generals and Battle for Middle Earth.
- OpenSC2K - Remake of SimCity 2000 by Maxis.
- OpenTTD - OpenTTD is a transport simulation game based upon the popular game Transport Tycoon Deluxe, written by Chris Sawyer. π΄
- OpenXcom - Clone of UFO: Enemy Unknown and X-COM: Terror From the Deep.
- OutpostHD - Remake of Sierra On-Line's Outpost.
- Ozymandias - An open source re-implementation of Pharaoh in the Julius/Augustus engine.
- Race into Space - Version of Interplay's Buzz Aldrin's Race into Space.
- Return To The Roots - Settlers II remake written in C++.
- Sourcehold - Implementation of Stronghold by Firefly Studios.
- Stone Kingdoms - A real-time strategy game made with LΓVE based on the original Stronghold by Firefly studios.
- VanillaConquer - Command and Conquer and Red Alert original release source port based on the remaster source code drop.
- VCMI - Engine for Heroes of Might and Magic III.
- Wargus - Warcraft 2 Mod that allows you to play Warcraft 2 with the Stratagus engine.
- Warzone 2100 - Free and open-source real time strategy game. π΄
- Zed Online - Remake of the 1996 classic game Z.