Mutant Fighter is an arcade game, with several versions (EM-2, EM-3, EM-4, EM-5) suggesting updates or revisions. These versions denote revisions or updates, implying that this version might contain bug fixes, new gameplay features, or possibly enhanced visuals.  The "World ver" designation suggests a version designed for international release. The game likely features fast-paced fighting action typical of arcade brawlers, though precise details regarding gameplay, characters, and storyline are missing in currently available information.  Further details about the developers or publishers remain unconfirmed.

Mutant Fighter (World ver EM-2)

Mustache Boy (Italy)