Level select
At the main menu, hold R2, then hold R1. Release R2, then release R1. Hold L1, then hold L2. Release L1, then release L2. Then, press Circle, Square.
Infinite Health 800FEB7C 0250
Infinite Health PT Boat 800FECA0 17F0
Infinite Health Jeep 800FF808 14B0
Infinite Health Tank 800FFA50 EAD0
Infinite Health Train 80100C90 1FF0
Infinite Grenades 800F8998 0909
Infinite Bazooka/Mortar 800F899A 0909
Infinite Flamethrower/Auto Rifle 800F899C 0909
All Levels Unlocked After First Save 800F7AD8 0002
800F7ADC 0006