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Only one. It's for all levels.

At the level select screen, plug in your second player controller. Once it's in, hold the up button on the D-Pad.

They, while holding the up button on Controller 2, press Start, Select, Select, and Square on Controller 1. You should now have all levels unlocked.

Note: There is also a "Cheat mode" available once you beat the game under any difficulty. It will give you bonus cheats, including "Head shots," "Ricochets," and "Enemies have big heads."

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∙ 16y ago
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What else can I help you with?