The goal of the game "Bloons Tower Defense 4" is to pop balloons that go over a path. Players place and upgrade shooting towers along the side of the path to prevent the balloons from reaching the end of a track.
"Bloons TD4" includes six new towers: the Glue Gunner, Monkey Ace, Mortar Tower, Monkey Apprentice and Banana Farm, in addition to Monkey Buccaneer. Each of these towers has a different kind of power, so players must strategically choose what type of tower to use depending on the kinds of balloons that go over the path. There are 14 kinds of balloons, with different strengths and weaknesses.
"Bloons Tower Defense 4" is the fourth installment of the "Bloons Tower Defense" series, which started in 2007 as a browser game developed in Adobe Flash, and later expanded to mobile platforms, such as Android, iOS, Windows Phone, PlayStation Portable and Nintendo DSi. It is developed by Ninja Kiwi.