Description: Bloons Tower Defense 4 is very popular online tower defense game. In this outstanding game you have to stop any helium-filled balloons from escaping the maze by building bloons popping towers. So kick back, place towers, and begin the balloon popping fun. Bloons Tower Defense 4 has new maps, new graphics and new units like an airplane and wizard, loads of new and original tower types and tons of upgrades for each tower type. Heaps of tracks, save games, career mode, sandbox mode and apopalypse mode. Good luck!