Kill 20 Enemies with Gunfire While Hanging

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

Kill 100 Enemies with Headshots

Explore Photo Mode

Find 20 Treasures

Defeat 20 Enemies with Hand-to-Hand Combat

Kill 5 Enemies in a Row with Headshots

Finish the Game on Easy Without Changing the Difficulty

Kill 50 Enemies by Melee-Attacking from Behind

Kill 50 Enemies with the Dragon Sniper

Kill 50 Enemies with the M4

Kill 50 Enemies with the FAL