Babylon 5 in Homeworld 2!
Cross platform 2D/3D game engine written in C++11 & OpenGL ES 2/3
A fast paced simple two player fighting game.
A basic 3D environment with a first-person POV
A generic 2D engine for any kind of game
TurboSphere is an easy to learn and powerful JS based game engine.
A Simple Game Engine
a flexible game engine
A very small multi-platform game engine for creating desktop games.
SNK vs Capcom Fangame with 8 bits style
Open Source Virtual World and MMOG Development Platform
Cross-platform reimplementation of AMOS BASIC (runtime)
a realtime graphics library
Pig2D is a game engine for Java that uses a sprite-based interface.
Reference implementation for the Doom game engine.