Enter the codes in the Enter Cheat area of the menu then go to the Cheat Menu to turn them on/off.

Effect	Code
BLLTSRRFRND	Unlimited Ammo
BSSNMBRN	Warp Longhunter
CHTLKDG	Warp Level 2
CHTRSNRPRSPR	All Map
CMGTSMMGGTS	All Weapons
CRPCRL	Warp Mantis
FDTHMGS	Show Credits
FRTHSTHTTRLSCK	Infinite Lives
GHTTBSHMD	Warp Level 5
GSHNTTBNCTPRDCRT	Big Heads
HCNLTHRSLF	Warp Level 6
HNSHM	Warp Level 3
JRSSCHT	Warp T-Rex
LKMBRD	Fly Mode
LKNGDNTHTLNCLTH	Warp Campaigner
LLTHCLRSFTHRNB	Purdy Colors
NSTHMNDNT	Show Enemies
NTTHTTHCTSTTHNG	Tiny Enemy Mode
RLMNDNTCHT	Invincibility
SNFFRR	Disco Mode
STHSNCSSR	Warp Level 7
THRTCRD	Warp Level 4
THSCKSTFTHSHSCK	All Keys
THSSLKSCL	Spirit Mode
THTDSTSCK	Warp Level 8
TSKTSKTSK	Warp Level 1