Enter CHEATONX as a password, then press Select during game play to display the cheat menu. Press Up or Down to select a level or Left or Right to select a zone. Press A for invincibility (001 will appear to confirm correct entry)
Enter QRTREATR as a password.
Enter PROJECTX as a password.
Level - Password2 - SPACEVAC3 - STARSBRN4 - WORMSIGN5 - INCOMING
