All Vehicles!
During gameplay, pause the game, and then select Cheats from the menu to enter the password input screen. Enter the following password to unlock the corresponding cheat. If you entered the password correctly, the cheat will take immediate effect.
Passwords are not case-sensitive.

Free Upgrades!
During gameplay, pause the game, and then select Cheats from the menu to enter the password input screen. Enter the following password to unlock the corresponding cheat. If you entered the password correctly, the cheat will take immediate effect.
Passwords are not case-sensitive.
Free Upgrades: TOOLEDUP

Infinite Ammo!
During gameplay, pause the game, and then select Cheats from the menu to enter the password input screen. Enter the following password to unlock the corresponding cheat. If you entered the password correctly, the cheat will take immediate effect.
Passwords are not case-sensitive.
Infinite Ammo: GUNBELT