A lightweight game server framework implemented with Actor Model
A fast and reliable entity component system (ECS) and much more
Source code repository of the FreeOrion project
Code for Cicero, an AI agent that plays the game of Diplomacy
Doom-based AI research platform for reinforcement learning
The flexible game engine
An OpenGL RTS game engine written in C
Botcraft is a cross-platform C++ library to create bots
A shield for the Arduino Mega that can back up video game cartridges
lua dev plugin for unreal engine 4 or 5
An Open Source DOS emulator to run old DOS games
Soft-body physics simulator
A downloadable game for Windows, macOS, and Linux
A strategy game with a high fantasy theme
FlightGear Flight Simulator: free open-source multiplatform flight sim
A free transportation simulator game
RTS game with the theme of Strategy by Design
A planetarium software that shows a 3D simulation of the night sky
For exploring cellular automata like Conway's Game of Life.
Good-looking and addictive OpenSource games