About Diep.io In Diep, blast your way to the top of the scoreboard all the while upgrading your tank to become more powerful, and eventually change your class all together. Multiple game modes gives you plenty to do - and kill.How to play Diep.ioMove around with WASD and shoot with the left mouse button. Upgrade your ship in the bottom right, or with the number keys, whenever you level. Every 10 levels, you can choose between a new type of tank.Diep.io StrategyWith RPG mechanics this rich, high leveled players will absolutely chew through the new guys. So avoid them at all cost, unless you like to be eaten. In team games, it's perfectly understandable if you want to hide behind your allies while you level up.