Bloonraker

 is an Extreme track. The paths can be pretty confusing since its a spiral path.

Trivia

 * The track's title is a reference to the James Bond film, Moonraker, along with the cutscene.
 * This track, along with Railway Track, Monkeys vs. Bloons, Crypt Keeper, Tar Pits, Candy Graveyard, and Bloody Puddles, is the only track that has more than four entrances and/or exits.
 * That being said, this track has the most entrances and exits in the entire BTD series.
 * The exit count is seconded only by Crypt Keeper (with Reverse Mode off), and the entrance count is seconded only by Crypt Keeper (with Reverse Mode on).