Time Clickers
90 Achievements
100,000 XP
Google Play
Corporal 3
Upgrade a Team Member 50 Times
1,000 XP
28.45%
How to unlock the Corporal 3 achievement in Time Clickers - Definitive Guide
Just upgrade all your heroes to level 200, and this achievement should pop as you have to upgrade a team member 50 times on them.