Enemy Territory: Quake Wars - Mac As the invasion begins, players choose to battle as one of five unique classes in either the human Global Defense Force (GDF) or the barbaric Strogg armies, each augmented with specialist weapons and combat hardware Troops utilize more than 40 conventional and futuristic vehicles, deployable structures, and defense systems like quad-bikes, tanks, and alien walkers for intense ground assaults; or helicopters and anti-gravity ships to lend firepower from the air Throughout each battle, teams establish bases, deploy defense structures, artillery, radar & advanced forward-command systems into enemy territory while constructing & demolishing obstacles to speed progress & gain a tactical advantage over the enemy