hold down NTAC at the same time to unlock all weapons. 
hold down BLU at the same time to get super speed.

Note:
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They only work in the full version not the demo.

Cheatmode:
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Submitted by: conner54

Enter one of the following codes during game play in the full version of the 
game:

Result        Code 
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All weapons - N + T + A + C  
Super speed - B + L + U