Source code repository of the FreeOrion project
Multi-platform 2D and 3D game engine
Doom-based AI research platform for reinforcement learning
Botcraft is a cross-platform C++ library to create bots
FlightGear Flight Simulator: free open-source multiplatform flight sim
A planetarium software that shows a 3D simulation of the night sky
A MUD client for Android, iOS, Linux, Mac OS X and Windows
Full featured MUD server with all the trimmings.
3D modeler, 3D game maker, 3D demo maker
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
PyCAPGE - Python Classic Adventure Point and Click Game Engine
All-in-one game engine built on Godot. Roblox & UEFN alternative
Injectable LUA scripting system, SDK generator, live property editor
Turn based tactical RPG with several campaigns, written in Rust
A development environment focused on modding
An ASI plugin for Grand Theft Auto V
MIT Licensed Open Source version of Torque3D from GarageGames
A Rust framework for building Minecraft servers
Open source reimplementation of GTA San Andreas game engine in Unity
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
ARCHIVED - KAMI Blue: a continuation of 1.12.2 KAMI
2D Game Engine