You must type T first, then the following codes

RATE - Displays the framerate
MPKFA - Invincibility
I WANNA BE LIKE KEVIN - Invincibility
VOORHEES - Invincibility
CAPINMYASS - Invincibility
NOCAPINMYASS - Turn of Invincibility
BUNZ - Weapons + Ammo
HONGKONG - Weapons + Ammo
IDAHO - Weapons + Ammo
LARA CROFT - Weapons + Ammo
MONTANA - Items, Weapons, Ammo
EDMARK - Suicide
KEVORKIAN - Suicide
JOJO - Weird view
MCGEE - Burn!
KRUEGER - Burn!
GRISWOLD - Full armor
FUNKY SHOES - Jump higher
KEYMASTER - Get all keys
SATCHEL - All Items
ONERING - Invisibility
CALGON - Level warp
MARIO - Level warp
SPIELBERG - Level warp + DEMO RECORDING
COUSTEAU - Full health
SPORK - Full health
STERNO - ?
FORK BROUSSARD - Wimpy mode :P
EVA GALLI - Clipping
GOONIES - Maps

Notes:
To record a demo, use "Spielberg", warp to a level and play a game. Then rename the EXLX.DEM file to something like BLOOD002.DEM and watch it get played. Delete/rename the other DEM files so you don't have to wait for them. Wanna check out the aerosol can? Type in the cheat "LARA CROFT", then start a new game and press 7. The graphics and sounds for the can aren't there, but it functions like it should. There are different ways to get this to work, this is only one way.