Bloons Tower Defense 3 Play these working flash games or read this if game doesn't load Go FullSreen Bloons Tower Defense 3 Bloons Tower Defense 3 is a free online strategy game. You have to build towers, earn money, choose upgrades, hire agents and use special strategies to complete the level. Play the other versions: BTD | BTD 2 | BTD 4 | BTD 5 |