At the corresponding ''Mission Select'' screens, key in the following codes:
Effect Code Unlock all co-op Campaign Missions Up, L1, Down, R1, Left, L1, Right, R1, Up Unlock all Single Player Campaign Missions Up, L1, Down, R1, Left, L1, Right, R1, Up
In game codes
At the in-game options screen.
Effect Code Infinite Ammo Left, Right, Up, Down, Up, Down, R2, L2 Invulnerable Up, Down, Left, Right, Left, Right, L2, R2
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