Main window in MUGEN download is divided into several tabs: Characters, Stages, Backgrounds, Foregrounds, Extras. Interface is user-friendly and easy to navigate. It has been used to create a variety of fan-made fighting games based on popular franchises, such as Street Fighter, Mortal Kombat, King of Fighters. MUGEN is easy to use and is constantly being improved. Application is customizable, allowing users to create their own characters, stages, gameplay mechanics.
It is written in C and originally released in July 1999. Program is well supported with a large community of users and developers. Software is written in C and released under GNU General Public License. M.U.G.E.N is a freeware 2D fighting game engine designed by Elecbyte.