Throws out secondary bombs instead of frags - causing widespread explosive poppage.
Cluster Bombs is an upgrade to the Bomb Tower that made its debut in Bloons TD 5. Its first ever appearance was in the Bloons TD 5 trailer which was released on Nov 29, 2011. It costs $680 on Easy, $800 on Medium, $865 on Hard and $960 in Impoppable.
Please note that this upgrade does prevent the Bomb Tower from destroying Black and Zebra Bloons without the aid of a Level 3 Bombing Range or a Monkey Intelligence Bureau. However, the Bomb Tower can be upgraded to Bloon Impact to be able to pop Black and Zebra Bloons without any other aid.