Defeat Olga Gurlukovich

Kiss a poster in a locker

Platinum

Find all 100 treasures

Defeat 30 enemies with the Mag 5

Defeat 30 enemies with the SAS - 12

Defeat ten enemies in a row, alternating hand-to-hand combat and gunplay

Defeat 30 enemies with the Tau Sniper

Defeat 20 enemies while swimming

Defeat 75 enemies in a row without dying

Find 80 treasures

20 times in a row, pick up ammo while rolling