Action Fighter/Hidden content

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Master System version

All letters collected

Enter "HANG_ON." as a name. This will begin the game with letters A, B, C and D already collected.

Invincibility

Enter "_©_SEGA." as a name. This will make the player character invincible to bullets.

All letters collected + invincibility

Enter "SPECIAL." as a name. This will enable both cheats listed above.

Extra lives after time up

Enter "GP_WORLD" as a name. This will award three extra lives when the timer reaches zero.

All cheats active

Enter "DOKI_PEN" as a name. This will enable all the cheats listed above.