It is classic tower defense game with mazes, minigames etc.This map is based and inspired by mmorpg World of Warcraft. It's made in fantasy style, as the towers are heroes and cannons of Azeroth, the enemies are common monstres from Kalimdor, Eastern Kingdoms, Northrend, Outland and other dangerous places :)
You can find it in arcade section of Starcraft 2 at any server (EU, US, KR, SEA).