Wii Cheats X-Men Origins: Wolverine Cheats Share Tweet Share Share Email Comments Berserk difficulty:To unlock Berserk difficulty, beat the game. Start a new game on Berserk difficulty with your completed save file to retain your XP and skills. Related Items: Share Tweet Share Share Email Click to comment You must be logged in to post a comment Login Leave a Reply Cancel replyYou must be logged in to post a comment.