Bloons TD 6
151 Achievements
75,500 XP
Google Play
Big Monkey
Deploy a tier 4 monkey tower
500 XP
46.42%
How to unlock the Big Monkey achievement in Bloons TD 6 - Definitive Guide
KRLA
TrueSteamAchievements
TrueSteamAchievements
To unlock this achievement you just need to get any monkey tower to level 4 on one of it's paths and then place it during a game. As you will know by now, you unlock new tiers by spending individual monkey XP.
