Offered to everyone for FREE, this combat engine has so far been used to create hundreds of fighting games with their own custom fighters, backgrounds, and gameplay systems, with many of such games achieving high acclaim for eye-catching visuals, addictive gameplay, and innovative gaming design. M.U.G.E.N (also known as Mugen, MUGEN) is a very popular 2D fighting game engine intended to provide users with all levels of game designer knowledge to build their own customized fighting game, or to simply enjoy the creations made by its large worldwide community.