| Bloons Tower Defense | |
|---|---|
 The logo of Bloons Tower Defense, the first game in the series | |
| Genre(s) | Tower defense |
| Developer(s) |
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| Publisher(s) | Ninja Kiwi |
| Platform(s) | Android, browser (Flash), iOS, macOS, Nintendo DSi, PlayStation Portable, Microsoft Windows, Xbox One, Nintendo Switch |
| First release | Bloons TD August 16, 2007 |
| Latest release | Bloons TD Battles 2 November 30, 2021 |
| Parent series | Bloons |
Bloons Tower Defense (also known as Bloons TD or BTD) is a series of tower defense games under the Bloons series created and produced by Ninja Kiwi. The game was initially developed as a browser game, built upon the Adobe Flash platform and released in mid 2007. Later games in the series expanded to support various mobile platforms, including Android, iOS, Windows Phone, PlayStation Portable, Nintendo DSi, Windows, Linux and MacOS. Games in the Bloons series older than Bloons TD 6 are available through the Ninja Kiwi Archive on Steam.
In the game, players attempt to prevent "Bloons" (the in-game name for balloons) from reaching the end of a set course by placing towers or road items along it that can pop the bloons in a variety of ways, typically by using the power of monkeys, magic, or technology. A handful of towers can stall the bloons and give the other towers more time to pop them by freezing and gluing the bloons. Money is gained by popping bloons, completing rounds, and collecting bananas from existing banana farms which can be spent on new towers, upgrades for existing ones, or temporary items such as exploding pineapples and road spikes. They also need to make sure that they do not lose all of their lives.