Activate a Tweak

Kill 30 Enemies with the Mag 5

Kill 50 Enemies by Melee-Attacking from Behind

Completed all the sub events in "Trail of the Gale."

Completed all the main events in "Trail of the Gale."

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

Kill 25 enemies without aiming

Kill 15 enemies with melee attacks

Completed the Chapter of the United Front

Finish the Game on Easy Without Changing the Difficulty

Kill 30 Enemies with the M9

Kill 30 Enemies with the T-Bolt Sniper

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