Complete An Ally in the Sand without touching a twister

Unlock a new combat attack

Do a barrel roll in a mission

Defeat an enemy in a mission

Complete one Cooperative Multiplayer game

Finish the game in Easy Mode

Kill 10 enemies with thrown-back grenades

Find 20 treasures

Complete "Dragonslayer"

Defeat 30 enemies with the M9

Complete "Elder Knowledge"

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

Defeat 30 enemies with the KAL 7