Invincibility
While playing a game, press Select, then hold L1 + L2 + R1 + R2 + Square and press Left. If you entered the code correctly, you will hear a sound and a message will appear. Repeat the code to disable its effect.

Invisibility
While playing a game, press Select, then hold L1 + L2 + Square and press Left. If you entered the code correctly, you will hear a sound and a message will appear. Repeat the code to disable its effect.

Full ammunition
While playing a game, press Select, then hold R1 + Square and press Left. If you entered the code correctly, you will hear a sound and a message will appear. Note: This code will reset your current weapons to only those available during level 1. Repeat the code to disable its effect.

Heavy weapons with full ammunition
While playing a game, press Select, then hold L2 + R2 + Square and press Left. If you entered the code correctly, you will hear a sound and a message will appear. Repeat the code to disable its effect.

Meele weapons
While playing a game, press Select, then hold L1 + R1 + Square and press Left. If you entered the code correctly, you will hear a sound and a message will appear. Repeat the code to disable its effect.

No clipping mode
While playing a game, press Select, then hold L1 + L2 + R1 + Square and press Left. If you entered the code correctly, you will hear a sound and a message will appear. You may now walk through walls. Repeat the code to disable its effect.

No gravity
While playing a game, press Select, then hold L1 + L2 + R2 + Left + Square and press Start. If you entered the code correctly, you will hear a sound and a message will appear. Repeat the code to disable its effect.

Blow up Anything [Submitted by: grante]
Press select and hold L1 L2 R1 R2 then press Square