Enter one of the following codes at the Cheat Menu. A message will confirm if you enter the code correctly:

Enemy Freeze:  DONTFARTONOSCAR.

Fill Bloodlust:  ANGRYXXXINSANEHOOKER.

God Mode:  RIASSASSINDONTDIE.

Gratuitous Dismemberment:  INSANEGIBSMODEGOOD.

Juggy:  JUGGYDANCESQUAD.

Level Select:  ONTHELEVEL.

Louisiana secret level: BRIMSTONEINTHEBAYOU

Restore Health: LAMEYANKEEDONTFEED.

Show Weapons:  SHOWMEMYWEAPONS.

Thank you Message - TERMINALREALITYRULES

Time Factor:  NAKEDNASTYDISHWASHERDANCE.
Sent in by Delav2002

Programmer Messages:

ALBATROSS
IAMANGRY
IAMNAKED
NAKEDHOOKER
SATANRULES
TERMINALREALITYISCOOL
TERMINALREALITYISLAME
TERMINALREALITYRULES
UVULA
XXX

Indiana Jones reference - In one of the small corner rooms in the Nazi part of the game, you can break a box to find the Ark Of The Covenant from Raiders Of The Lost Ark.
Sent in by Sinclair

Gameshark Codes

(M) MUST BE ON 0E3C7DF21853E59E   EE9270CABCD7B81A
Unlock All Cheats CEA35E1EBCA99A82
Godmode CEAC7BBEBCA99B84
Enemies Frozen CEAC7B46BCA99B84
Show Weapons On Body CEAC86D2BCA99B84
Juggy Mode CEAC7B0ABCA99B84
Dismember Mode CEAC7B52BCA99B84