Death Match Level:
Enter the following as a password:
FBBC VBBB FBBC VBF7

Change Colors:
Enter the following as a password:
S3TC 00LC 0L0R S???

Unlimited Ammo:
Enter the following as a password(ONLY WORKS IN MULTI-PLAYER MODE):
S3T1 NF1N IT3S H0TS

Lower Gravity:
Enter the following as a password:
S3TL 0WGR VITY ????