Sky

Sky is a new terrain in the next Bloons Tower Defense game. Some battles will take place far above the ground, when all you can see is the open sky. Certain tracks may also have cliffs, with land or water for part of the game area, and just sky past the edge of the cliff. Aerial towers (such as the Monkey Ace, although its launch area won't show up on the screen) may be placed in Sky terrain without doing anything special, but to place any other towers, you must first place a Cloud.