At the character selection screen, choose Load and enter the following:
CodeUnlocks FATHEADFull Cheats ENCHILADA!"" "" BRAINSALADBrian The Brain and Space World CODY Invincibility
FANPLASTIC'Plastic' graphics GUNSMOKE! Ranged weapons MELEEDEATH Melee weapons MULTIPLEX!All FMV PENCILSPen and ink graphics TWRECKSPADT. Wrecks and Jungle World UNIQUEWPNSPersonal weapons WHACKLAND Whack ANgus and Desert Level EARLSPLACE Count Earl and Transylvania World
Big Head mode:
During play, press L + R + Up.
Thanks to Revolution readers Shadow, tommy clarke, Whack Angus, Jeff Perrin,
Adrian Martinez and Martiniman!