3D urban environment renderer : browser-app ; as well as a GTA clone
Flexible and easy-to-use 2d game engine
Multi-platform game engine similar to old Megaman with a stage editor
A public domain cross platform 3D game
A game engine written in the D programming language
A 3D game engine in java.
Dragging and Dropping Components for Multi-projection Applications
A collection of all maps and games made for the TripleA game engine
C++11 cross-platform game engine using SDL2
starcraft clone game
The world's smallest chess playing program just got smaller!
2D game engine for traditional platform games
Unity3D DIS(1278.1) Implementation
a very lightweight advanced terrain-rendering and 3D map rendering sys
2d/3d Game Engine
plugin-based RPG manager in C++ and Qt5
A free and open 3d action game.
3D Game Engine
Paintown is a 2d fighting game engine.
Godot is a fully featured, open source, MIT licensed, game engine.