Successfully complete the game on the "Fetish" difficulty setting, then press Down(2), Circle, Up, Square, Triangle, Square, R2, Up(2), L1, Triangle at the title screen. If you entered the code correctly, the message "God Mode" will appear at the bottom of the screen. Note: The game cannot be saved while this code is enabled.
Use the following trick to save the game while in God mode. Enable the God mode code, then finish a few levels with a three star rank or higher until you get a bonus level (Hard as Nails, Brawl, ect.). Then, play one of the bonus levels, die, and quit. This will reset the codes you enabled. Next, play any easy level and save at one of the check points. You will keep all the stars that you have earned with the cheat codes.
Successfully complete the game, then press L1 + L2 + R1 + R2 at the title screen to hear a backwards message being whispered. Note: A new segment of whispering can be heard each time the buttons are pressed.
Successfully complete levels 1 through 5 with a three star or greater rank to unlock the Hard as Nails mini-game.
Successfully complete levels 6 through 10 with a three star or greater rank to unlock the Brawl Game mini-game.
Successfully complete levels 11 through 15 with a three star or greater rank to unlock the Monkey See, Monkey Die! mini-game.
Successfully complete levels 16 through 20 with a three star or greater rank to unlock the Time 2 Die mini-game.
Play on the "Hardcore" difficulty setting and either do lots of gruesome executions or get lots of kills, and finish the level as fast as you can. Also, be stealthy and avoid confrontations as much as possible. Fist fights or ruined stealth opportunities make you lose time and lower your ranking.
When on a level that requires a crowbar to open a gate, just shoot the lock with a gun. You can now walk through the gate.
To finish off Piggsy, after you stab him three times go up the stairs and lure him onto the grate at the top level. The grate will bend the first time and he will run away. Lure him back upstairs and onto the grate for a second time and he will fall through. Make sure that you are also not on the grate or you will suffer a similar fate as Piggsy.
After you are let out of the execution room, you will soon find yourself in a basketball court where you have to defeat several gang members that are sent out after you. There is an opening in the fence around the court where you will see a posted sign reading "Vote Congressman Matthew R. Dione for Willington Mayor". Under the sign in the tall grass should be a sawed-off shotgun.
In this level, you must kill the smiley hunter on the tower and bring his body to the guard room. Kill the hunter on the tower and make sure to cut off his head. However, do not bring his body to the guard room (just his head). An intermission sequence will show you entering the guard room with only the head. Starkweather will say "For bringing this head I will leave you a little gift in the next location". Look around for the unknown item.
When a victim is on the ground begging for his life and before you finish him off, hold R3 and start attacking. The camera angle will then show a partial close-up view through the eyes of the victim, with you swinging away.
In many instances a foe can lose his head in one of the death animations, such as baseball bat level 3 or wire level 3. If you smack a downed opponent in the head, their head will basically explode. If you have severed their head prior then go to smash it in, it will still explode as if the head were still attached to the body.
Hit a save point with a throwable head with you. If you die, it will become a head with a bag wrapped around it.
When you kill Starkweather and Cash puts the chainsaw through his head, Starkweather's corpse falls over. Cash will then put the chainsaw in his stomach. However, sometimes he does not directly get it on his body and you should see the chainsaw floating in mid-air.
Towards the end of the game, the journalist on television doing a news report about Starkweather mentions Carcer City's police chief Gary Schaffer and his involvement with Starkweather. In Grand Theft Auto 3, on the Lips 106 radio station, a news report states "In nearby Carcer City, police chief Gary Schaffer's was cleared of corruption charges." It then continues to say "Let's hope those missing witnesses turn up soon."
In the journalist's apartment, in the one room is a blue and white shopping bag with the words "Gash" written on the front of it. This is the same name of a department store in the North Point Mall in Grand Theft Auto: Vice City.
In the Fueled By Hate level go to the junkyard. The car crusher and its surroundings are the same from Grand Theft Auto: Vice City's junkyard.
In the View Of Innocence level, on the second floor in one of the shoot out locations, look for a little counter with the words "Tarbrush Café" and a little picture of a coffee cup. The Tarbrush Cafe is the location where Tommy and Lance had to destroy in the Cop Land mission in Grand Theft Auto: Vice City.
The following codes have no effect until you complete both levels with a five star rank on the hardcore difficulty setting to unlock them. Each code has two parts, each of which are unlocked by a specific two levels (for example, completing the Trained to Kill and Border Patrol levels with a five star rank unlocks the "Invisibility" cheat). When this is done, one half of a code will appear at the bottom of the image that is now unlocked in the "Bonus Features" menu. Once both halves (images) are unlocked, that specific code can now be activated in any level in the game.
Successfully complete the Born Again and Doorway into Hell levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press R2(2), L1, R2, Left, Right, Left, Right. This code allows unlimited sprint.
Successfully complete the Road to Ruin and White Trash levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press R1, L1, R2, L1, Right, Left(3). Enemies will no longer be able to hear you.
Successfully complete the Fuelled by Hate and Grounds for Assault levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press R2, Right, Circle, R2, L2, Down, Circle, Left.
- Helium Hunters
Successfully complete the Strapped for Cash and View of Innocence levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press R1(2), Triangle, Circle, Square, L2, L1, Down. Enemies will have high pitched voices.
- Fully Equipped
Successfully complete the Drunk Driving and Graveyard Shift levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press R1, R2, L1, L2, Down, Up, Left, Up. You will have all weapons.
- Super Punch
Successfully complete the Mouth of Madness and Doing Time levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press L1, Triangle(3), Circle(3), R1.
- Rabbit Skin
Successfully complete the Kill the Rabbit and Divided They Fall levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press Left, R1(2), Triangle, R1(2), Square, L1.
- Monkey Skin
Successfully complete the Press Coverage and Wrong Side of the Tracks levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press Square(2), R2, Down, Triangle, Square, Circle, Down.
Successfully complete the Trained to Kill and Border Patrol levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press Square(3), Down, Square, Down, Circle, Up.
- Piggsy Skin
Successfully complete the Key Personnel and Deliverance levels with a five star rank on the hardcore difficulty setting. Then at the main menu, press Up, Down, Left(2), R1, R2, L1(2).