Every 3 shots the cluster bombs send out more cluster bombs for even more destruction.
~ BTD6 Description
Recursive Cluster is the fourth upgrade of Path 3 for the Bomb Shooter in BTD6. It allows the Bomb Shooter to shoot tertiary bombs every third shot. That means that on every third shot, all 8 clusters will explode into 8 more clusters, totalling to 64 bombs on the third shot. It costs $2,040 on Easy, $2,400 on Medium, $2,590 on Hard, $2,880 on Impoppable.

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