Successfully complete the game. Select the "New Game" option and you will be able to select an alternate costume for Enoch. To unlock the alternate costumes, complete the following tasks.
Complete the following tasks to unlock PlayStation 3 trophy rewards.
Complete the game once on either Easy or Normal to unlock both Hard and Extra (Very Hard) difficulties. From the main menu, begin a new game to access the new difficulty modes.
After you have cleared the game, choosing "New Game" will allow you to select any chapter at any difficulty in order to challenge the game for a score and rank. At this time, you can also choose Enoch's outfit.You can unlock these at any difficulty, so Easy is recommended.The outfits are purely cosmetic except the "Special" outfit. This outfit makes you take no damage, but it also negates the score you get for fighting and collecting items through the stage (you only get special bonuses and a bonus for time). This makes it impossible to get the higher ratings.