diep.io - How do I upgrade my tank? - Arqade

I am playing Diep.io and I would like to know how to become another tank in Diep.io. For example, I see an Overlord and would like to become that tank.

What Are The Different Diepio Classes? - Diep.io Tanks, Mods, Hacks

diep.io - How do I use the Shooting Star with Factory? - Arqade

diep.io - What are points, builds, and stats? - Arqade

Upgrades Game guide, Upgrade, Art memes

Auto-Upgrading : r/Diepio

Upgrades, Diep.io Wiki

Diep.io All Upgrades - Diep.io Tanks, Mods, Hacks

What are the fastest tanks in diep.io? - Arqade

What are scoreboards on Diep.io? - Arqade

Diep.io Tanks, Classes; Updates & Levels - Diep.io Tanks, Mods, Hacks

Upgrades, Diep.io Wiki