Players choose to battle as one of five unique classes in either the conventionally armed GDF army or the futuristic Strogg invasion force, each outfitted with specialist weapons and combat hardware. In this adrenaline pumping fight for survival, warring forces utilize a variety of different vehicles, deployable structures, and defense systems including quad-bikes, tanks, and alien walkers for epic ground assaults; or helicopters and anti-gravity ships to unleash airborne attacks. Throughout each battle, teams establish bases, deploy defense structures, artillery, radar, and advanced forward-command systems into enemy territory while constructing and demolishing obstacles to speed progress and gain a tactical advantage over the opponent.