Enter one of the following cheats as a code.


Cheats - Result 

SKETCHPAD - Enable concept art 
BOUNZMEN - Enable bouncy men 
CLUTZ - Show cluttered locations 
DIRECTOR - Unlock FMV sequences 
NINJA - Unlock combos 
STYLIN - Show an alternate ending 
STRAPPED - Give all weapons 
STEELUP - Give armor 
SLUGGER - Give baseball bat 
BUTTERUP - Give health 
FPSSTYLE - Enable free-aim mode 
WIMP - Show end sequence 
PASSKEY - Unlock all levels 
QUITER - Skip a level 
MRJUAREZ - Max ammo 
SPINACH - Max damage 
MAXIMUMHURT - Unlock pain arenas 
SCARYCLOWN - Be a clown 
GNRLINFANTRY - Be a GI 
HISSSS - Be a lizard 
LRGARMS - Enable invincibility 
HAIRLOSS - Be Nikki 
MRROBOTO - Be a Robot 
IAMSODEAD - Be a Zombie 
BIGLIPS - Be Moseley 
JAILBREAK - Be a Convict 
WEIGHTGAIN - Be Nara 
SLIZOMIZO - Enable slow motion 
SUPERJOHN - Be a super-hero 

Easy kill:
In the rooftop battle, if you knock down a man, you can throw him off the building, 
killing him.

When you are being attacked by someone, press Crouch + Strong Attack (Kick). 
You will spin with your leg out while crouching and knock them down, which will 
make it easy to pick them up and throw off a surface, stomp on them, pick them 
up then attack, or just throw them into a wall. Note: This works very well if large 
crowds are attacking. If they jump when you do this and you miss, either kick 
them and do it again or try it again immediately (spin with your leg out while 
crouching). Usually, Precrime with blue armbands will jump.

Enable the "Maximum ammunition" code. Buy the puke grenade and use it to 
make your enemies unconscious. Then, pick them up and you can throw them 
around, punch them, and use them as a body guard . Note: You must quickly pick 
them up, as they stay unconscious for a limited amount of time.

Defeating Nikki Jameson:
Note: You must be able to get to the top floor. On the last level, once you are on 
the top floor, jump onto the space that you can stand on the pit that falls to the 
bottom. Make sure that you do not fall in. Eventually, Nikki will use the attack 
where she jumps onto your head and grabs it. When she does this, you will both 
fall into the pit, but the ending sequence will appear before you die. Note: She 
may just knock you with normal punches and kicks, but when you get close to 
falling, just reposition John.

Suspect: Nikki Jameson level: Prevent Nikki attacks:
A Wasp Launcher is required for this trick. At the end of the level, where you turn 
the corner and confront Nikki, partially creep through the door. Do not go all the 
way or you will trigger the ending scene. Fire the Wasp Launcher so the projectiles 
will lock on to Nikki and she will run up out of the hallway. She is invincible, but will 
not attack Barry. Note: If you walk through the hall, you will end the level as 
normal. 

Practice against police:
When in the level where there is a revolt with gangsters against the normal cops, 
after defeating the PC units, side with the gangsters. You will be able to practice 
fighting moves on the normal police.