Simple opensource crossplatform openGL&GLext
A lame multi-user dungeon engine.
Free MMORPG Engine. Develop and host graphical browser-based games.
An open source MMORPG engine.
Basic real-time simulation engine in C++
Experimental raycasting engine
DREAM is an Open Source GCS
Classic Doom Frontend
MKEngine is a game engine for Text-Based games.
Anni is on free open-source C# UCI bitboard chess engine
A simple WinAPI game engine
Gomoku Game: Playing with Computer