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]](https://gith