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Dreamcast - Slave Zero cheats

Maximum health, ammunition:
During a single player game, press L + R + X on controller 2.

Enemy AI toggle:
During a single player game, press L + R + A on controller 2.

God Mode and unlimited ammo:
During a single player game, press L + R + X (or B) on controller 2.
Repet the code to disable the cheat effect.