Twisted Metal 4

Password: Start, Start, Start, Start, Start

Go to the password screen in options and type in L1, left, right, circle, right as your password.

Enter in these codes quickly while playing the game.

Go to the options menu and go to "password" and enter Down, Left, L1, Left, Right. You should hear sweet tooth's laugh to confirm.

Enter the following codes at the Password Screen.

Enter any of these passwords at the password screen:

Sweet Tooth: start, R1, right, right, left
Crusher: down, R1, right, R1, L1
Moon Buggy: start, triangle, right, L1, start
RC Car: up, down, left, start, right
Super Auger: left, circle, triangle, right, triangle
Super Axel: up, right, down, up, L1
Minion: triangle, L1, L1, left, up
Super Thumper: circle, triangle, start, circle, left
Super Slamm: right, L1, start, circle, start

You should now have the vehicles that you entered at the password screen!

Enter the code of Left, Circle, Triangle, Left, Down to unlock Super Auger (you'll hear the sound of laughter to confirm that you entered it correctly).

First of all never engage Sweetooth when he is facing you because he will use his special every time. You can defeat Sweetooth easily by using proximity mines inside the Haunted House. And stay on the move at all times. If you get caught in one of Sweettooth's specials then use your shield.

For every level you beat in Tournament, you will unlock a secret Deathmatch-only level. Beat the complete game once and you'll unlock all the secret characters: Sweet Tooth, Moon Buggy, Super Thumper, Super Axel, Super Auger, Super Slam, RC Car, Minion, and Crusher.