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.

NEW SECRET UPGRADE CHART?? - Diep.io New Update - Epic Monster Kills With The Hybrid Tank Domination

What do the different colors signify in the diep.io class chart? - Arqade

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

Diep.io Upgrade Path - Diep.io Tanks, Mods, Hacks

Tiers, Diep.io Wiki

NEW SECRET UPGRADE CHART?? - Diep.io New Update - Epic Monster Kills With The Hybrid Tank Domination

Upgrades, Diep.io Wiki

CREATE YOUR OWN TANK FOR FREE! DIEP.IO GIANT ARENA CLOSERS HACK: Diep.io Gameplay (New Feature)

Diep.io - NEW CLASS Upgrade Upgrade BATTLESHIP Tank (/Diepio Gameplay)

diep.io - How do I use the Claw with Overlord? - Arqade