Defeat 4th Colossus

Finish the game in Hard Mode

Defeat 2nd Colossus

Find 45 treasures

Kill 50 enemies with the Moss - 12

Kill 30 enemies with the M79

Find 40 treasures

Finish the game in Normal Mode

Kill 20 enemies by shooting from the hip (without aiming with the L1 button)

Find 35 treasures

Kill 50 enemies with the 92FS - 9mm

Kill 20 enemies with the Desert - 5

Kill 100 enemies with headshots