Since this is a wiki, you are free to add and change information on M.U.G.E.N here. for use with the M.U.G.E.N fighting game engine, as well as gameplay mechanics and terminology. The MUGEN Database aims to document characters, stages, etc. There have been 4,228 articles since September 2005. Welcome to the MUGEN Database! The MUGEN Database is a wiki about the customizable 2D fighting game engine, M.U.G.E.N.