Kill 20 Enemies with Brutal Combo

Find the Strange Relic

Kill 30 Enemies with the M79

Activate a Tweak

Finish the Game on Crushing Without Changing the Difficulty

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

Kill 50 Enemies with the Micro-9mm

Wreck an opponent's hero vehicle in an online match

Defeat 250 Enemies with Headshots

Finish the Game on Normal Without Changing the Difficulty

Kill 50 Enemies with the M4

Kill 75 Enemies in a Row Without Dying

Kill 100 Enemies with Headshots