Kill 10 enemies with thrown-back grenades

Defeat 30 enemies with the Arm Micro

Finish the game in Hard Mode

Finish the game in Easy Mode

Defeat 30 enemies with the Tau Sniper

Defeat 30 enemies with the M9

Find 40 treasures

Defeat five enemies in a row using stealth attacks

Defeat 30 enemies with the Mk-NDI

Defeat 50 enemies with hand-to-hand combat

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

Make five enemies drop their grenade by shooting them