Perform a 15x combo

Meet up with the Biker

Unlock THE ABYSS

Finish SUBWAY without the Gang Leader seeing you

Clear the 1st floor of NO MERCY with the silencer

Kill 50,000 enemies

Use every weapon in the game at least once

Get the big picture

Clear a level with each snake mask

Clear a level with each of the Son's techniques

Unlock all snake masks

Unlock all weapons for the Soldier

Get A+ on all levels on normal