Body Harvest
Invincibility
To get invincibility press: A, C-Up, C-Down , B, L, R.
Credit Goes To: Jacob Fry via IGN 64

Smart Bomb
Enter your name as ICHEAT then start the game. While playing, 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.
Credit Goes to: Andrew H. via IGN 64

Surreal Mode
Enter your name as ICHEAT then start a new game. While playing, press C-Down, Up, Right, Right, C-Right, A, Left.
Credit Goes to: Gary (garc@flash.net) via IGN 64

Easier Game
For an easier game, go to Difficulty Select and press LEFT repeatedly until it says "Very Easy."
 Invincibility
 Smart Bombs
 Surreal Mode
 Easier Game
 Harder Game
 Fat Legs
 Restore Health &
 Fuel
 Short Adam
 Tall Game
 Weak Boss
 Black Adam
 Dancer
 Kill Adam
 All Artifacts
 All Weapons
 More Powerful
 Weapons
Harder Game
Go to the difficulty selection screen then press RIGHT repeatedly until "Very Hard" appears.
Credit For Codes Goes to: Game wiz (PoLo6572aol.com) via IGN 64

Fat Legs
Enter your name as ICHEAT then start a new game. While playing, press Left, A, Right, Down to give the aliens fat legs.
Credit Goes to: Kevin Swope (PulseBombs@aol.com) via IGN 64

Restore Health and Fuel
Enter ICHEAT as a name. Then, press Down, Up, Right, A, B, Left, C-Right during game play.

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

Tall Adam
Enter ICHEAT as a name. Then, press B, A, C-Up, A, C-Up, A during game play.

Weak Boss
Enter ICHEAT as your name. Then, press Z, C-Right, C-Right, B, Left, C-Right during game play.

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

Dancer
Enter ICHEAT as your name. Then, press Down, Up, C-Up, Down, C-Right, C-Right during game play.

Kill Adam
Enter ICHEAT as a name. Then, press B, Left, C-Right, C-Right, Down during game play.

All Artifacts
Enter ICHEAT as a name. Then, press Up, C-Down, C-Right, Z, Up, Left during game play.
Credit For Codes Goes to: Tony Benson via IGN 64

All Weapons
Enter your name as ICHEAT then start a new game. While playing, press A, Right, C-Down, C-Right, C-Up, A, Left.
Credit For Codes Goes to: Jeff188993@aol.com via IGN 64

More Powerful Weapons
Enter your name as ICHEAT then start a new game. While playing, press Down, Up, Fire, Fire, Left, Right.