6 players work together and build units, turrets, and towers. The goal is to keep waves of enemies from reaching the end of the road. There are several new units including a modified marine called a spartan (you know where it's from). Every faction gets at least 2 new units. All teams get modified bunkers that look different and add range (towers). Towers can be built on or off creep and may contain: scvs, drones, all terran infantry, infested brutes, hydralisks, roaches, archons, stalkers, dark templars (only used to make cheaper archons), and sentries. Money is rewarded after each wave, and each player starts with a barracks.