A complete 3-D game development suite written in 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
scene-oriented, flexible 3D engine (C++, Python, C#, Java)
A modern, cross-platform Quake game engine based on FitzQuake.
Royal Entertainment Graphics eXecution (REX)
Ze Text Adventure game Builder : Create as you play !
Full featured MUD server with all the trimmings.
A Complete WebGPU Game Engine for Browser & Desktop Arcade Oriented
Visual Basic 6 2D online adventure game engine
Play Fighting Fantasy fan stories on this simple engine
Amateur 3D Game Engine
Orx: Portable Game Engine
Game engine supporting many 3D/2D formats and graphic effects
PyCAPGE - Python Classic Adventure Point and Click Game Engine
A free 3D game engine to create games and realtimes scenes for Windows
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.