Mega Monkey

"Deploy a tier 5 monkey tower"

- BTD6 description

 is an Achievement in BTD6, earned by obtaining a Tier 5 upgrade. Collecting the Achievement rewards will earn 50.

Summary
Any Tier 5 upgrade will work for this achievement, and it's not too hard to unlock it. Unlock any desirable Tier 5 upgrade and purchase that upgrade in a real game.

Tips

 * If you have a cheap enough Tier 5 upgrade unlocked, you can easily earn this achievement by placing it in Defation Mode.