EM-4 represents another iteration of Mutant Fighter, indicating continuing refinement of the gameplay experience. Like EM-3, this version might have improved on EM-2 and EM-3 through various adjustments. The "World ver" label indicates the target audience is a global gaming community.  It was likely released in arcades, emphasizing quick and accessible gameplay suitable for short play sessions. Specific details on the development team, precise release dates, and gameplay variations between versions remain unconfirmed.

Mutant Fighter (World ver EM-4)

Mustafa and 40 Thieves (version)