TimeSplitters 2 - Platform: Playstation 1

Infinite Ammo: 
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Complete Story Mode on the Hard difficulty setting to unlock infinite 
ammunition in all game modes. 

Big Tony: 
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Beat the Mafia Mission on normal to unlock the master... 
Big Tony 

Unlock arcade level called Streets: 
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To unock the arcade level ''Streets'', just beat the game on easy difficulty. 

Unlock Cardboard Characters: 
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Beat the game on easy to obtain the Cardboard Characters cheat. 

Unlock Characters In Arcade Mode: 
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Earn a Gold medal in Adios Amigos (Arcade) to unlock Hector Babasco 
and Lean Molly. 

Unlock Rotating Heads Cheat: 
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To unlock the rotating heads cheat, just beat Pane in the Neck in 
Silver (Challenge mode). 

Unlock Some Silly Hats: 
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Viking Hat - Beat ''Silent But Deadly'' with a Gold or Silver medal 

Pirate Hat - Beat ''Trouble At The Docks'' with a Gold or Silver medal. 

Big Ears - Beat ''Escape from Neotokyo'' with a Gold or Silver medal. 

Unlock the Site Multiplayer Level: 
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I noticed the level unlock code someone submitted didn't list The Site. 
To unlock The Site level, complete Story mode on Hard. 

View the Ending Movie:
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Successfully complete the Space Station on Easy mode to view the ending movie.