Apocalypse Amiga Cheats
The cheat mode is FRANK backwards and it must be entered during play as follows: Press and hold [K], press and hold [N] while holding [K]. Release [K], press and hold [A] while holding [N]. Release [N], press and hold [R] while holding [A]. Release [A], press and hold [F] while holding [R]. Release [R], release [F]. You are now invulnerable to enemy fire. At the beginning of each level the cheat is disabled and must be reentered to reenable it.