A complete 3-D game development suite written in Java
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A refreshingly simple data-driven game engine built in Rust
A high-performance, industry-standard 2D physics engine built on Box2D
Cross-platform 2D game engine focused on ultimate productivity
A modern, cross-platform Quake game engine based on FitzQuake.
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Full featured MUD server with all the trimmings.
Ze Text Adventure game Builder : Create as you play !
Amateur 3D Game Engine
Game engine supporting many 3D/2D formats and graphic effects
Orx: Portable Game Engine
PyCAPGE - Python Classic Adventure Point and Click Game Engine
A conservative source port of Hexen that is identical to DOS
A conservative source port of Heretic that is identical to DOS
Fork of AbuseSDL to carry on development
Conservative port of BOOM 2.02 to modern systems.
Spring is a free RTS engine developed for Windows, Linux and Mac OS X.
DOOM / Heretic / Hexen source port with enhanced graphics and UI
2D Game Engine