Question

How many towers do you Have to take down in co-op Mode?​

Answer 1

Answer:

It is unlocked at Level 20. It involves 2-4 cooperating on a random or private chosen game of BTD6 on a chosen map and difficulty. Co-Op Mode can be accessed on the main menu.

Answer 2

Answer:

Number of towers that can be destroyed is not specific or it is infinite, which means you can choose as many towers as you want to destroy. But, initially each team is provided with set of five towers.

This is a technique in a game which is based on adobe flash known as Boon, where the main aim is to defend your balloons from being popped by opponents and popping opponent's balloons.

One can use co- op mode only after unlocking level 20.