At the "Press Start" screen, hold R1 and press Up, Triangle, Down, X, Left, Square, Right, Circle, Left(2), Right, Square to unlock the M468 Assault Rifle. This 6.8mm assault rifle is a high powered weapon and fires 750 rounds per minute. This weapon has an effective combat range of 600m, is ideal for defeating armored targets, and is best suited for long range encounters.