Retro Game Cheats for Prototype (PC Games)
Effect: Unlock Body Surf ability
When:
At the main menu, select the "Extras" option, then choose the "Cheats" selection. Enter the following code
How:
Enter: Right(2), Left, Down, Up(3), Down
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Effect: New Game+ Mode
When:
During the Game
How:
Finish the non-plus mode of a game such a Normal to enable Normal+ mode and the like. In Game+ mode, Alex's skills are unlocked at the start
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Effect: Hard Mode