AMOK Level select: Enter ZZZCYX as a password. Invincibility: Enter XBABYX as a password. The word "Correct" will confirm correct password entry. You will lose energy, but no lives, during game play. Rapid fire: Enter YAYAYA as a password. Bonus mission: Move south after completing the objectives in mission 1, phase 2. Enter the alternate exit in the dead end canyon to start a bonus underwater mission. Level-Phase Password 2-2 CBYXYC 3-1 XABXAB 3-2 AZCBXC 4-1 YYBBCY 4-2 BAXCXX