At the weapon equip screen, press [Up] [Up] [Down] [Down] [Left] [Right] [Left] [Right] [Aim].Extra difficulty level
Beat the game to unlock an extra difficulty level under arrange and original modes.Hunk scenario and Extreme Battle mode
Beat the game on the hard difficulty level with the best rank for Claire's A and B scenarios and Leon's A and B scenarios. Hunk is a soldier that must reach the second floor of the police station from the sewer with just battles and no puzzles. Extreme Battle mode unlocks Chris Redfield and Ada Wong as characters.