Defense of the Ancients, an extremely popular mod for Warcraft 3, has a huge following all of its own. In it, players choose a hero to play on one of two sides. They must defend their main base while trying to take down their opponent's. To help assist them in both goals, waves of creeps, low powered, computer-controlled armies, join the battle at regular intervals for both teams. Players work side-by-side with other heroes and these creeps, to wipe out the opponent's armies, heroes and defenses with the ultimate goal of destroying the enemy's ancient or main base.