RPG Maker 2000/2003 and EasyRPG games interpreter
DRM remover of the SteamStub variants
A development environment focused on modding
Open-source rhythm game
Home theater software and entertainment hub for digital media
The main repository for the development of the evolution game Thrive
Multi Theft Auto is a game engine
Magic Another Game Engine
Endless Sky is a sandbox-style space exploration game
The source code to VVVVVV
A game of dungeon exploration, combat and magic
Doom-based AI research platform for reinforcement learning
Accuracy-focused XNA4 reimplementation for open platforms
RetroArch is a frontend for emulators, game engines and media players.
Solar2D Game Engine main repository (ex Corona SDK)
Free and open source real-time strategy game
Access GameLift resources and integrate GameLift into your Unity game
A terminal based Pokemon like game
A Steam library categorizing tool
An elegant Go board and SGF editor for a more civilized age
An open source blooket auto-player / cheat
Web application brings custom skins back in offline Minecraft servers
Multiplatform MIDI File Player for Linux, Windows, and macOS
FlightGear Flight Simulator: free open-source multiplatform flight sim