Open source games

This is a list of different open-source video games and commercial video games open-source remakes.

Table of contents

• Action games
• Adventure games
• Business and Tycoon games
• City-Building games
• First-Person games
• Platformers
• Puzzle games
• Racing games
• Real-Time strategies
• Roguelikes
• Role-Playing games
• Sandbox games
• Shoot 'em up games
• Sport games
• Third-Person games
• Tower Defense games
• Turn-Based strategies
• Other lists

Action games

• Hypersomnia - Competitive top-down shooter with extreme dynamics and pixely nostalgia. Comes with a built-in map Editor. [source]

Adventure games

• Dead Ascend - A zombie adventure, escape room, with twists. [source]

• Endless Sky - Space exploration, trading, and combat game. [source]

• Pioneer - A space adventure game set in our galaxy at the turn of the 33rd century. [source]

• ScummVM - A program which allows you to run certain classic graphical adventure and role-playing games. [source]

• The Legend of Zelda: Twilight Princess - A reverse engineering project to decompile Twilight Princess into human-readable and modifiable source code. [source]

• Zelda 3 - A reverse engineered clone of The Legend of Zelda: A Link to the Past. [source]

Business and Tycoon games

• CorsixTH - Open source clone of Theme Hospital. [source]

• Hurry Curry! - Cooperative fast-paced multiplayer cooking game. [source]

• OpenLoco - An open source re-implementation of Chris Sawyer's Locomotion. [source]

• OpenRCT2 - An open-source re-implementation of RollerCoaster Tycoon 2. [source]

• OpenTTD - An open source simulation game based upon Transport Tycoon Deluxe. [source]

City-Building games

• Akhenaten - A strategic city-building game, based on assets and gameplay mechanics from Pharaoh + Cleopatra title, where players take on the role of a ruler and mayor of ancient Egyptian civilization. [source]

• Citybound - A city building game that uses microscopic models to vividly simulate the organism of a city arising from the interactions of millions of individuals. [source]

• Cytopia - A free, open source retro pixel-art city building game. [source]

• Egregoria - Egregoria is an indie city builder, mostly inspired by Cities: Skylines. [source]

• IsoCity - Isometric city-building simulation game built with NextJS, TypeScript and TailwindCSS. [source]

• Julius - An open source re-implementation of Caesar III. [source]

• micropolisJS - A handmade Javascript port of the open-source city simulator Micropolis. [source]

• Unknown Horizons - A 2D realtime strategy simulation with an emphasis on economy and city building.

  • Original: [source] Engine: FIFE [source]

  • Godot port: [source] Engine: Godot [source]

First-Person games

• .kkrieger - A first-person shooter video game created by German demogroup .theprodukkt (a former subdivision of Farbrausch), which won first place in the 96k game competition at Breakpoint in April 2004. [source]

• Anarch - This isn't a 90s style retro shooter, this is a 90s shooter. [source]

• AssaultCube - A FREE, multiplayer, first-person shooter game. [source] Engine: CUBE [source]

• Cube 2: Sauerbraten - A free multiplayer & singleplayer first person shooter. [source] Engine: CUBE [source]

• Descent 3 - A first-person shooter video game/ [source]

• Liblast - A Libre Multiplayer FPS Game built with Godot 4 engine and a fully open-source toolchain. [source] Engine: Godot [source]

• Red Eclipse - An old-school arena shooter for the modern age. [source] Engine: CUBE [source]

• Surreal Engine - Unreal Tournament Engine Reimplementation. [source]

• The Dark Mod - First-person stealth video game. [source]

• Xonotic - An addictive arena-style first person shooter with crisp movement and a wide array of weapons. [source]

Aliens Versus Predator game source ports

• AvP Forever - Project focuses on maintenance of available source code for Aliens versus Predator (1999) game. [source]

• avpmp - Fork of the original AvP port for Linux, expanded with multiplayer and other features. [source]

• NakedAVP - A port of Aliens vs Predator Classic (2000) to modern systems, based on the icculus port for Linux, macOS and Windows using SDL3 ([source]). [source]

Build engine [source] based games

• Duke Nukem 3D - By 3D Realms Entertainment, Inc. [source]

• Shadow Warrior - Official source release for Shadow Warrior. [source]

Source Ports and Re-Implementations

• BuildGDX - [source]

• EDuke32 - The official EDuke32 Git repository: home to the source code to EDuke32, Ion Fury, VoidSW, Mapster32, and related projects based on the Build Engine.

• JFDuke3D - Port of the 3D Realms game Duke Nukem 3D [source]

• JFShadowWarrior - Port of the 3D Realms game Shadow Warrior.

• NBlood - Reverse-engineered ports of Build games using EDuke32 engine technology and development principles (NBlood/Rednukem/PCExhume d) [source]

• NuBuildGDX - A fork of BuildGDX aiming for stability, bug fixing and performance. [source]

• Raze - Build engine port backed by GZDoom tech. Currently supports Duke Nukem 3D, Blood, Shadow Warrior, Redneck Rampage and Powerslave/Exhumed.

id Software Games

• Doom - [source]

• DOOM64-RE - Complete reverse engineering of Doom 64. [source]

• Doom 3 BFG Edition - [source]

• Quake - [source]

• Quake II - [source]

• Quake III Arena - [source]

• Wolfenstein 3D - [source]

Source Ports and Re-Implementations

• Catacomb 3-D

  • CatacombGL - A source port of Catacomb 3D and the Catacomb Adventure series. [source]

• Doom

  • Chocolate Doom - A Doom source port that accurately reproduces the experience of Doom as it was played in the 1990s. [source]

  • ZDoom - A feature centric port for all Doom engine games. [source]

• Quake

  • Chocolate Quake - A purist Quake source port that restores the original look and feel of v1.09 and earlier. [source]

  • FTEQW - Powerful engine for playing and modding idTech based games. [source]

• Wolfenstein 3D

  • ECWolf - A port of the Wolfenstein 3D engine based of Wolf4SDL. [source]

  • Wolf4SDL - An open-source port of id Software's classic first-person shooter Wolfenstein 3D to the cross-platform multimedia library SDL. [source]

Platformers

• Commander Keen

  • Commander-Genius - An open-source interpreter for the Commander Keen (1-6, Dreams) and Cosmo's Cosmic series which allows you to play the original episodes and some of the mods made for them. [source]

  • Commander Keen in Keen Dreams - A side-scrolling platform video game developed by id Software. [source]

  • Omnispeak - An open-source re-implementation of Commander Keen in Goodbye Galaxy. [source]

• DDraceNetwork - Cooperative 2D online platformer. [source]

• Fish Folk Games

  • Jumpy - A tactical 2D shooter. [source] Engine: Bevy [source]

  • Punchy - A 2.5D side-scroller beatemup, made in Bevy. Engine: Bevy [source]

• Frogatto & Friends - An action-adventure platformer game, starring a certain quixotic frog. [source] Engine: Anura [source]

• OpenGOAL - This project is to port Jak & Daxter Series to PC. [source]

• Rigel Engine - This project is a re-implementation of the game Duke Nukem II, originally released by Apogee Software in 1993 for MS-DOS. [source]

• Sonic Robo Blast 2 - A 3D open-source Sonic the Hedgehog fangame built on Doom. [source]

• Super Mario 64 - A full decompilation of Super Mario 64. [source]

• VVVVVV - [source]

Puzzle games

• BlockOut II - A free adaptation of the original BlockOut® DOS game edited by California Dreams in 1989. [source]

• Portal64 - A demake (remake for an older platform) of Portal for the Nintendo 64. [source]

• Whatajong - [source]

Racing games

• Dust Racing 2D - A traditional top-down car racing game including a level editor. [source]

• ManiaDrive - A free clone of TrackMania, the great game from Nadéo studio. [source] Engine: Raydium [source]

• Rigs of Rods - An open-source physics sandbox simulation game that can simulate the motion and deformation of vehicles in real time. [source] Engine: OGRE [source] UI: Dear ImGui [source]

• RVGL - A cross-platform rewrite / port of Re-Volt that runs natively on both Windows and GNU/Linux. [source]

• Speed Dreams - A free and open source motorsport simulator. [source]

• Stunt Rally - 3D racing game with Sci-Fi elements and own Track Editor. [source]

• SuperTuxKart - A free kart racing game. It focuses on fun and not on realistic kart physics. [source]

• TORCS - The Open Racing Car Simulator - A highly portable multi platform car racing simulation. It is used as ordinary car racing game, as AI racing game and as research platform. [source]

• Trigger Rally - A fast-paced single-player racing game for Linux and Windows. [source]

• VDrift - A cross-platform, open source driving simulation made with drift racing in mind. [source]

• Yorg - Yorg (Yorg's an Open Racing Game) is a free open source racing game developed by Ya2 using Panda3D for Windows, OSX and Linux. [source] Engine: Panda3D [source]

• wipEout - This is a re-implementation of the 1995 PSX game Wipeout. [source]

Real-Time strategies

• 0 A.D. - A free, open-source game of ancient warfare. [source]

• BAR - Beyond All Reason. [source] Engine: Spring [source]

• Dune II The Maker - A Dune 2 remake. [source]

• Freeserf.net - Аn authentic remake of the game The Settlers I by BlueByte. [source]

• Keeper FX - An open-source remake and fan expansion of Dungeon Keeper. [source]

• Mindustry - A sandbox tower-defense game. [source]

• OpenAge - A free (as in freedom) cross-platform RTS game engine that provides the mechanics of Age of Empires. [source]

• OpenHV - An Open Source Pixelart Science-Fiction Real-Time-Strategy game. [source]

• OpenRA - Command & Conquer, Dune 2000 and Red Alert rebuild for the Modern Era. [source]

• Permafrost Engine - An OpenGL 3.3 Real Time Strategy game engine written in C. [source]

• Standard Of Iron - A modern real-time strategy (RTS) game engine built with C++20, Qt 6, and OpenGL 3.3 Core. [source]

• Warzone 2100 - A free, open source, 3D real-time strategy game with a story-driven single-player campaign, online multi-player, offline skirmish, and more. [source]

• Widelands - A free, open source real-time strategy game. [source]

• Zero-K - RTS game with physical projectiles, smart units and a powerful UI. [source] Engine: Spring [source]

Blizzard Entertainment Games Re-Implementations

• OpenBW - Free and open-source Best Wargame. [source] Brood War API [source]

• Strategus Engine Games [source]

  • War1gus - A re-implementation of Warcraft: Orcs & Humans that that can be played on modern platforms. [source]

  • Wargus - Importer and scripts for Warcraft II: Tides of Darkness, the expansion Beyond the Dark Portal, and Aleonas Tales. [source]

  • Wyrmsun - A strategy game which features elements of mythology, history and fiction. [source]

  • Stargus - Importer and scripts for Starcraft. [source]

• Warsmash Mod Engine - An emulation engine to improve Warcraft III modding. [source] Engine: LibGDX [source]

Westwood Studios and EA Games from Command & Conquer Series

• Command & Conquer Remastered Collection - TiberianDawn.dll, RedAlert.dll and the Map Editor for the Command & Conquer Remastered Collection. [source]

• Generals - Command & Conquer Generals, and its expansion pack Zero Hour. [source]

• Red Alert - [source]

• Tiberian Dawn - [source]

Roguelikes

• Brogue CE - Brogue is a minimalist, turn-based, procedurally-generated roguelike game where you descend a perilous dungeon to retrieve the Amulet of Yendor. [source]

• Cataclysm: Dark Days Ahead - A turn-based survival game set in a post-apocalyptic world. [source]

• Dungeon Crawl Stone Soup - An open source roguelike adventure through dungeons filled with dangerous monsters in a quest to find the mystifyingly fabulous Orb of Zot. [source]

• NetHack - Single player dungeon exploration game. [source]

• Meritous - An action-adventure dungeon crawl game. [source]

• OpenNefia - Moddable engine reimplementation of the Japanese roguelike Elona. [source]

• Shattered Pixel Dungeon - An open-source traditional roguelike dungeon crawler with randomized levels and enemies, and hundreds of items to collect and use. [source]

Role-Playing games

• Ambermoon.net - A full C# rewrite of Ambermoon. [source]

• Daggerfall Unity - An open source recreation of Daggerfall in the Unity engine. [source]

• Exult - A project to recreate Ultima VII for modern operating systems. [source]

• Fallout Community Edition - A fully working re-implementation of Fallout. [source]

• Fallout 2 Community Edition - A fully working re-implementation of Fallout 2. [source]

• GemRB - A portable open-source implementation of Bioware’s Infinity Engine [source]

  Supported games:

  • Baldur’s Gate

  • Baldur's Gate II: Shadows of Amn

  • Icewind Dale

  • Icewind Dale II

  • Planescape: Torment

• Kandria - An action RPG made in Common Lisp. [source] Engine: Trial [source]

• Naev - A 2d action/rpg space game that combines elements from the action, rpg and simulation genres. [source]

• Oolite - An open-world space opera. [source]

• OpenEnroth - Might and Magic VI-VIII engine remake using original data & code. [source]

• OpenMW - A free, open source, and modern engine which re-implements and extends the 2002 Gamebryo engine for the open-world role-playing game The Elder Scrolls III: Morrowind. [source]

• OpenNox - An open-source community collaboration project extending the Nox engine. [source]

• reone - A free and open source game engine, capable of running Star Wars: Knights of the Old Republic and its sequel, The Sith Lords. [source]

• Severed Chains - The Legend of Dragoon decompiled, reverse engineered, and ported to PC/Mac/Linux/Steam Deck. [source]

• Space Station 14 – Open-source remake of Space Station 13. [source]

• Ultima VII: Revisited - A replacement engine for Ultima VII that presents the game in 3D and fixes various issues with the game. [source]

• Veloren - multiplayer voxel RPG written in Rust. [source]

Diablo Re-Implementations

• Abyss Engine - Clean-room reimplementation of Diablo 2, written in C. [source]

• DevilutionX - A port of Diablo and Hellfire that strives to make it simple to run the game while providing engine improvements, bugfixes, and some optional quality of life features. [source]

• Freeablo - A work-in-progress free and open-source replacement for the Diablo I engine. [source]

• Open Diablo II - An open source re-implementation of Diablo 2. [source]

Massively Multiplayer Online Role-Playing Games

• OpenKO - An open source version of the old school Knight Online MMORPG. [source]

• OpenKore - A custom client and intelligent automated assistant for Ragnarok Online. [source]

Sandbox games

• Minosoft - An open source minecraft client, written from scratch in Kotlin (and java). [source] [source]

Shoot 'em up games

• SDL Sopwith - A port of the classic biplane shoot ‘em-up “Sopwith” to run on modern computers and operating systems. [source]

• Taisei Project - A free and open-source fangame of the Tōhō series, written in C using SDL3 and OpenGL. [source]

Sport games

• Open Golf - A cross-platform minigolf game written in C. [source]

• Pooltool - A sandbox billiards game that emphasizes realistic physics. [source]

Third-Person games

• Command & Conquer Renegade - [source]

• CroftEngine - An open-source Tomb Raider 1 engine remake. [source]

• Lugaru: The Rabbit's Foot - Cross-platform, open-source 3D action game. [source]

• OpenLara - Classic Tomb Raider open-source engine. [source]

• OpenRW - A Grand Theft Auto III re-implementation. [source]

• Overgrowth - The sequel to Lugaru. [source]

• RE3 - The fully reversed source code for GTA III and GTA VC. [source]

• Tomb Engine - An open-source engine for custom Tomb Raider adventures. Core Design era (1 - 5). [source]

Tower Defence games

• Server Survival - Tower defense game that teaches cloud architecture. Build infrastructure, survive traffic, learn scaling. [source]

Turn-Based strategies

• Ancient Beast - A turn based strategy indie game project played online against other people. [source]

• Athena Crisis - A modern-retro turn-based tactical strategy game. [source]

• C-evo - A freeware empire-building game for Windows. [source]

• fheroes2 - A recreation of Heroes of Might and Magic II game engine. [source]

• FreeCol - A turn-based strategy game based on the old gameColonization, and similar to Civilization. [source]

• Freeciv - A Free and Open Source empire-building strategy game. [source]

• FreeOrion - A free, open source, turn-based space empire and galactic conquest (4X) computer game. [source]

• Hnefatafl - The game of Copenhagen Hnefatafl. Sort of like chess. [source]

• OpenPanzer - Javascript/HTML5 rewrite of Panzer General II game. [source]

• OpenXcom - An open-source clone of the popular UFO: Enemy Unknown and X-COM: Terror From the Deep video games by MicroPros. [source]

• The Battle for Wesnoth - A turn-based strategy game with a high fantasy theme. [source]

• Unciv - Open-source Android/Desktop remake of Civilization V. [source]

• VCMI Project - Open-source engine for Heroes of Might and Magic III. [source]

Other lists

• Awesome Game Remakes

• Awesome Open Source Games

• Games on GitHub

• Libre Game Wiki

• List of (interesting) FOSS game engine replacement projects

• List of Open Source Games

• Mac Source Ports

• Open Source Game Clones

• Wikipedia list open-source video games