Defeat 30 enemies with the Desert - 5

Finish the game in Hard Mode

Defeat 250 enemies with headshots

Defeat 50 enemies with stealth attacks

Defeat 70 enemies with the FAL

Find 70 treasures

Finish the game in Normal Mode

Defeat 50 enemies with the 92FS - 9mm

Defeat 20 enemies with the Pistole

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

Defeat 70 enemies with the M4

Find 30 treasures

Defeat 20 enemies with gunfire by aiming while hanging