Complete a Co-Op mission.

Complete "Exodus in America".

Fire a Pack-a-Punched Ballistic Knife at a downed ally to revive them from a distance.

Finish the single player campaign on any difficulty

Kill 10 enemies with grab and throw

Complete the evacuation at Times Square

Assist the evacuation at Bryant Park

Assist the Marines in Madison Square

Infiltrate the CELL facility at Wall Street

Single Player: Kill 4 enemies in a row with headshots

Escape the Battery Park evacuation center

Made contact with Earth

Used the Brutal Melee move against another player