Time Clickers
90 Achievements
100,000 XP
Google Play
Fat Cat
Destroy 5,000 Rainbow Cubes
2,000 XP
13.61%
How to unlock the Fat Cat achievement in Time Clickers - Definitive Guide
speedygamers901
TrueSteamAchievements
TrueSteamAchievements
I got this in wave 74 when doing a long idle session, or you could do it in natural progression as well if you wanted to.