Exo Survival mode pits you and up to three other players against countless waves of enemy soldiers, drones, Dobermans, and ASTs. The rounds get increasingly more difficult, with more hostiles and the occasional objective round. Objective rounds force you and your team to move out and gather Intel, defuse bombs, collect Dog Tags, or defend a specific point on the map.
Players advance to the next level by completing Round 25. At that point, you return to Round 1 with tougher enemies.