KlayGE is a cross-platform open source game engine with plugin-based architecture. It's started since 2003. The explicit goal of KlayGE is: to arm your engine with cutting-edge technology. It provides a framework to make game development, testing, porting as simple as possible. Before compiling KlayGE, Python 2.7+ and CMake 3.4+ must be installed first. Then you can run build_all.py to build KlayGE, its Samples, Tools, etc. For details, please see http://www.klayge.org/wiki/index.php/Installation.