Defeat 30 enemies with the Mag 5

Defeat 75 enemies in a row without dying

Defeat five enemies in a row with headshots

Defeat 30 enemies with the Tau Sniper

Defeat 50 enemies with stealth attacks

Defeat ten enemies with propane or acetylene tank explosions

Finish the game in Hard Mode

Finish the game in Easy Mode

Find all 100 treasures

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

Find 80 treasures

Play in the swimming pool on the Cruise Ship

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