Source code repository of the FreeOrion project
Free game engine for development of desktop, mobile, and web games
Code for Cicero, an AI agent that plays the game of Diplomacy
Purpur is a drop-in replacement for Paper servers
An OpenGL RTS game engine written in C
Botcraft is a cross-platform C++ library to create bots
Doom-based AI research platform for reinforcement learning
lua dev plugin for unreal engine 4 or 5
Games for tomorrow's programmers
A frontend for Mupen64Plus
An Open Source DOS emulator to run old DOS games
A downloadable game for Windows, macOS, and Linux
Soft-body physics simulator
Action RPG that's easy to mod
A strategy game with a high fantasy theme
an unofficial respin of Void Linux with a complete out-of-the-box xp
FlightGear Flight Simulator: free open-source multiplatform flight sim
A free transportation simulator game
RTS game with the theme of Strategy by Design
For exploring cellular automata like Conway's Game of Life.
A planetarium software that shows a 3D simulation of the night sky