Complete the game on any difficulty to unlock Mercenaries Mode, Infinite Ammo option, New Game+ mode, History of Resident Evil, Sheva Alomar, Chris's Safari alternate costume, and Sheva's Clubbin alternate costume.
Perform the corresponding tasks to unlock the following bonuses:
BONUS - HOW TO UNLOCK Classic Horror Filter - Complete the game on amateur difficulty. Retro Filter - Complete the game on normal difficulty. Professional Difficulty and "Noise Filter" - Complete the game on veteran difficulty. Unlock Rocket Launcher w/ Infinite Ammo - Complete the game in under 5 hours on any difficulty. Then, enable it at the "Bonus Features" menu.