How to Upgrade Your Tanks on Diep.io

The Tank

Spawn as an ordinary level one tank.

Open the map. Press and hold Y on your keyboard to open this map.

Upgrade. Once upgrades are available, they will appear in the upper left-hand corner of the screen. Click to select the one you want.

Upgrade to Tier 2. Once you reach level fifteen, you can upgrade to one of the four tier-2 tanks: Twin, Sniper, Machine Gun, and Flank guard. These are discussed in more detail below.

The Twin

Upgrade to a Twin for an extra gun. A Twin is a tank with an added gun.

Choose your upgrade path. Once you reach level 30, there are more upgrade options. The Quad Tank has four guns, the Twin Flank has two guns on each side, and the triple shot has three guns in front.

Upgrade your Quad Tank. Once the quad tank reaches level 45, it can upgrade to Octo Tank or the Auto 5. The Octo Tank has eight guns. The Auto 5 has 5 guns that can independently fire.

Upgrade your Twin Flank. Once the Twin Flank reaches level 45, it can upgrade to triple Twin (six guns in pairs of two on each side), or the Battleship. The Battleship looks like the Twin Flank, but uses hundreds of drones instead.

Upgrade your Triple Shot. Once the Triple Shot reaches level 45, it can upgrade to Triplet (three guns close together), Penta Shot (five guns in front) or Spreadshot (11 miniguns spread out in front).

The Flank Guard

Upgrade to a Flank for fire power on both sides. The Flank Guard is a tank with an extra gun on the opposite side.

Upgrade your Flank Guard. Once you reach level 30, the Flank Guard can upgrade to four choices: The Twin Flank, the Quad Tank, the Auto 3, and the Tri-Angle. The Quad Tank has 4 guns, equally distanced. The Auto 3 has three swiveling independently firing guns. The Tri-Angle has 2 extra cannons in the back, positioned to increase speed.

Upgrade your Tri-Angle. Once the Tri-Angle reaches level 45, it can either upgrade to Booster (Tri-Angle with two added mini-guns in back) or Fighter (Tri-Angle with two added guns on sides).

Upgrade your Auto 3. Once the Auto 3 reaches level 45, it can upgrade to Auto 5 (two more guns) or Auto Gunner (4 small guns in front with an auto gun on top of the tank).

Upgrade your Quad Tank. The Quad Tank can upgrade to the Octo Tank (8 guns all around the tank) or Auto 5.

Upgrade your Twin Flank. The Twin Flank can upgrade to Triple Twin (three pairs of twin guns equally distanced),or Battleship (explained in sniper-overseer section).

The Machine Gun

Understand the pros and cons of the Machine Gun upgrade. The Machine Gun is a tank with a wider cannon, and it reloads faster, but its bullets are inaccurate.

Upgrade your Machine Gun tank. Once you reach level 30, you can upgrade to either a Destroyer (large bullets but slow reload. With max bullet damage and penetration, can kill tanks in one shot.) or a Gunner (four mini-guns). At level 45, the Machine Gun can upgrade directly to Sprayer, which sprays small and large bullets.

Upgrade your Destroyer. Once it reaches level 45, the Destroyer can upgrade to a Annihilator, Hybrid, Rocketeer, or Skimmer. Annihilator is a Upgraded destroyer, with a bigger cannon and bullet. Hybrid is a Destroyer with drone spawner that gives you 2 drones. Rocketeer shoots bullets like rockets, shooting bullets behind them as they travel. Skimmer is a tank that shoots spinning projectiles that also fire bullets as they spin, somewhat similar to the Rocketeer. Once you upgrade to Rocketeer or Skimmer, you can no longer kill max health tanks in one shot.

Pick your next upgrade path. Once Gunner reaches level 45, you have 3 options: Auto Gunner, Gunner Trapper, and Streamliner. Auto Gunner is Gunner with one auto cannon mounted in the middle of the tank. Gunner Trapper has two small guns in the front and a trap layer in the rear. This creates a trail of triangular traps to damage enemies. Streamliner is a tank with 5 guns in one. This results in a steady stream of bullets in a line.

The Sniper

Upgrade to a Sniper for a fast bullet with distance. The sniper is a tank that has faster bullet but slower reload, and you can see further. You also move slower. The damage of the bullet also increases as it travels further.

Upgrade your Sniper Tank. At level 30, Sniper can upgrade to either a Hunter (shoots two bullets at once), an Assassin (very fast bullets and stronger bullet damage, and even bigger field of view.), a Trapper (shoots triangles that damage shapes and enemy tanks), or an Overseer (creates triangular drones you can control).

Upgrade your Overseer. At level 45, Overseer can upgrade to 6 tanks: The Overlord, Necromancer, Manager, Overtrapper, Battleship or Factory. Manager is like Overseer, but it can become invisible and has one less spawner. Necromancer makes you square-shaped and transforms normal squares you (or your drones) collide with into square drones you can control. Factory makes your tank square as well, and will produce up to 6 drones that are like mini tanks (there is even a chance a new player will spawn on you). Battleship has four trapezoid spawners attached to it like Twin Flank but with the spawners being smaller. It uses Drones of its team’s color. The Overtrapper has two drone spawners and a trap launcher that are of equal distance from each other. Overlord is like Overseer, but it has two extra spawners across from each other and perpendicular to the two already on the tank. This increases drone stats. Holding right-click will make your drones spread out beyond sight.

Upgrade your Assassin. Assassin can upgrade to a Stalker (becomes invisible if not moving) or a Ranger. Ranger only upgrades how far you can see. It has second longest sight range.

Upgrade your Hunter. The Hunter upgrades at level 45 to either Streamliner (5 cannons in 1) or Predator. Predator shoots three different-sized bullets. Holding right-click on the mouse enables a very far-seeing ability. This ability makes predator the farthest-seeing tank in the game.

Upgrade your Trapper. At level 45, Trapper has 5 upgrade options: The Tri-Trapper, Mega Trapper, Overtrapper, Auto Trapper and Gunner Trapper. The Tri-Trapper has three trap launchers equally apart from each other. The Mega Trapper decreases the reload but increases the size and strength of the traps significantly. It also has a larger launcher. Auto Trapper is trapper, but with an uncontrollable auto turret on top. Gunner Trapper has two small gunner cannons in the front and a trap layer in the rear. The Overtrapper has two drone spawners and a trap launcher that are of equal distance from each other.

The Smasher

Upgrade to a Smasher for ramming. The Smasher is a hexagon-shaped tank with no cannons. It is used to ram enemies. You can upgrade from a normal tank to a smasher at level 30.

Upgrade your Smasher further. At level 45, Smasher can upgrade into Spike (large spikes around the tank making more damage dealt), Auto Smasher (just an added auto gun on top), or Landmine (Becomes invisible if motionless for some time.).