Find the Strange Relic

Find all 100 treasures

Defeat five enemies in a row using stealth attacks

Finish the game in Normal Mode

20 times in a row, pick up ammo while rolling

Defeat 30 enemies with the M9

Defeat 30 enemies with the Tau Sniper

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

Kill 10 enemies with thrown-back grenades

Defeat 20 enemies by blind-firing while in cover (without aiming with L1/R1)

Defeat 30 enemies with the KAL 7

Complete one Cooperative Multiplayer game

Defeat 100 enemies with headshots