Dart Monkey (BTDU)

"Throws a single dart that pops up to two bloons. A cheap and straightforward tower."

~Ingame Description
Like its appearances in earlier games, the Dart Monkey is the first tower the player encounters, and is the cheapest tower overall. His low cost and ease of use comes at a cost of popping power, even with upgrades Dart Monkeys will struggle against later waves, and they have few ways of contributing against MOAB-class bloons.

The Dart Monkey is the only tower in the game that starts with Level 1 and 2 upgrades unlocked. (The first two upgrades of the Crossbow specialization as well as Long Range Darts and Enhanced Eyesight are unlocked and used during the tutorial, and the other secondary paths are unlocked as a reward afterwards.)

Trivia

 * The Dart Monkey has been a stable of the series since the very first game.
 * The crossbow upgrades are changed to be the first specialization of the Dart Monkey, as the developers decided that it is the closest to the original theme of the Dart Monkey and is also easy to understand for new players.