Open Source real-time strategy game engine for early Westwood games
Enigma is a puzzle game
dhewm 3 main repository
GemRB is a portable open-source implementation of the Infinity Engine
2D game development library for Ruby and C++
Orx: Portable Game Engine
Opensource crossplatform Fallout 2 game engine writen in C++ and SDL
A Master of Magic game
A greedy game engine for greedy programmers
RTS game with the theme of Strategy by Design
A free transportation simulator game
A modern, cross-platform Quake game engine based on FitzQuake.
A strategy game with a high fantasy theme
Odamex is a free, cross-platform, modern client-server Doom engine
Seven Kingdoms: Ancient Adversaries
A cross-platform port of Hexen II game.
3D modeler, 3D game maker, 3D demo maker