Additional difficulty levels...
	All weapons...
	Dancer...
	Fat legged aliens...
	Mutant alien...
	Smart Bomb...
	Suffer mode...
	Surreal graphics...
	Various Cheat Codes...
	Weapons power-up...

Repeated press Left at the difficulty selection screen to access the "Very Easy" setting or repeatedly press Right to access the "Very Hard" setting.

Enter ICHEAT as a name. Then, press A, Right, C-Down, C-Right, C-Up, A, Left during game play.

Enter "ICHEAT" as a name. Then while playing a game, press Down, Up, C-Up, Down, C-Right, C-Right.

Enter ICHEAT as a name. Then, press Left, A, Right, Down during game play.

Enter ICHEAT as a name. Then, press C-Down, Up, Z(2), C-Right, Right during game play. Enabling this cheat while facing a harvester will transform turn that alien into a mutant.

Enter your name as ICHEAT, during the game press A, C-Up, C-Up, Up+Left to launch a smart bomb. The bomb will destroy all minor enemies, shield generators and processors on the screen.

Enter "ICHEAT" as a name. Then while playing a game, press C-Down, Up, Z(2), C-Right(2). Repeat the code to disable it

Enter ICHEAT as a name. Then, press Down, Up, Right(3), A, Left during game play.

Enter your name as ICHEAT and use these codes while playing the game.

Effect	Code
Access All Weapons	Press A, Right, Down C, Right C, Up C, A, Left.
All Artifacts	Press Up, Down C, Right C, Z, Up, Left.
Dundee cheat	Press Down, Up, C-up, Down, C-right, C-right.
Evil Black Suit	Press C-left, C-right, A, C-down, C-right and then Left.
Extra Smart-Bomb	Press A, C-up, C-up, up, left.
Fat Legs	Press Left, A, Right, Down.
Generates Alpha Power-up	Down-C, Up, Z, Z, Up, Down-C, Right-C.
Increase Weapon Power	Press bottom-C, top-C, Up, Z, Z, Left, Left, and right-C.
Kill Adam (main character)	Press B, Left, C-right, C-right, Down.
Make Adam dance	Press Down, Up, C-up, Down, C-right, C-right.
Mutant Alien	Press c-down, up, Z, Z, c-right, right.
Restore Health	Press down, up, right, A, B, left, C-right.
Short Fat Adam	Press Down, C-left, A, Right, Z.
Surreal Mode	Press C-down, up, right, right, C-right, A, left.
Tall and Lanky Adam	Press B, A, C-up, A, C-up, A.
Weak Bosses	Press Z, C-right, C-right, B, left, C-right.

Enter ICHEAT as a name. Then, press Down, Up(2), Z(2), Left, Right during game play.