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X-Men Origins: Wolverine Cheats, Codes, Hints, Tips
Unlock: Berserk (Hardest) Difficulty
Beat the game on any difficulty. You may replay the game by inheriting your previous experience and skills on any difficulty level (but only on that save file).
Hint: Fast and Furious
Get extra experience points by defeating bosses quickly and by destroying all the gun turrets in a stage.