The Big Three is a Special Mission that happens in the track Bloontonium Lab. In the center of the lab, there is an Artillery Battery made of 3 The Big Ones. each one of the mortars have their own targets. Each one has the explosion size of The Big One and the speed of an Artillery Battery. The Super Pop and Awe ability is also available. Each 5 rounds, The Big Three sucks up your most expensive tower. Pass Bloontonium Lab on Hard.