Defeat 250 enemies with headshots

Find 40 treasures

Defeat 30 enemies with the Moss - 12

Defeat ten enemies using hand-to-hand combat on the back of the convoy trucks

Defeat 30 enemies with the T-Bolt Sniper

Hit three enemies with fish in the market

Defeat ten enemies with propane or acetylene tank explosions

Defeat 50 enemies with stealth attacks

Defeat 30 enemies with the Tau Sniper

Defeat 20 enemies by shooting from the hip (without aiming with L1/R1)

Defeat five enemies in a row using stealth attacks

Stand on the crocodile in the Secret Library