Kill 20 Enemies by Shooting from the Hip (without aiming)

Kill 50 Enemies by Melee-Attacking from Behind

Kill 30 Enemies with the Tau Sniper

Find 40 Treasures

Kill 20 Enemies with Gunfire While Hanging

Defeat 20 Enemies by Blind-Firing While in Cover (without aiming)

Defeat 50 Enemies with Hand-to-Hand Combat

Kill 20 Enemies with Headshots

Find the Strange Relic

Use a Limit Break

Explore Photo Mode

Finish the Game on Easy Without Changing the Difficulty