Enter "QVZLBVSQLV" as a password and play the game on the medium difficulty setting. Intentionally lose all lives, then re-enter the same password. Begin a new game on the easy difficulty setting, then intentionally lose all lives. Begin another new game on the easy difficulty setting, then collect the light burden. Your character will now possess the particle accelerator and the chain gun. Note: Collect the pistol on level 2 to get ammunition for the chain gun.

Alternate end sequence

When the enemy appears in level 9, press Down. After entering the tunnel, shoot the computer and destroy the incubator. Then an alternate ending sequence will begin.

Level passwords

Level Easy Medium Hard

2 DVYLWKVYNL QVYLWKVYDT DLTLWKVYYC

3 GRYLWKWVNR TRYLWKWVNN GNYLWKWVPP

4 DRYLSRWVRY QRYLSRWVTS DNYLSRWVPT

5 GVZLSRWQKZ TVZLSRSQKB GLZLSRSVPW

6 DVZLSVQKK QVZLBVSQRL DLZLBVSVVB

7 GRZLBVSQZY TRZLBVBQKB GNZLBVBQVL

8 DRZLBVSQGG QRZLBVBQKS DNZLBVBQVN

9 GVYNBVBQGD TVYNBVBQRL GLYNBVBQQD

Game Shark Codes

Note: You must have a 2.1 or higher version of the Game Shark to use these codes in a Game Boy Color system.

Infinite Lives	010AABC1
Infinite Health	0163A9C1

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A woman is in the hospital and just had twins, a boy and a girl. But no one is there with her except her brother.
The nurse comes into the room after the delivery and says,"your brother has taken the liberty to name the children."
The new mother says,"Oh no. he probably gave them stupid names."
The nurse says,"The girls name is denise."
The mother says,"That's not bad, i like it. And the boys?"
The nurse says,"The boys name is De-nephew."