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Mad Stalker: Full Metal Force (PS1)

Mad Stalker: Full Metal Force PSX
Genre: Action
Perspective: Side view
Gameplay: Beat 'em up / brawler, Fighting
Vehicular: Mecha / giant robot
Setting: Sci-fi / futuristic
Published by: Family Soft
Developed by: Fill-In Cafe
Released: 1997
Platform: PlayStation (PSX, PS1)

2D Japanese beat em' up and that says it all. You are a big robot and beat other robots. The original was released in 1994 on the Sharp X68000. The PS1 version takes everything to a 2.5D perspective.