The Auto-4 is one of the Arras.io Tier 4 Tanks that can upgrade from the Auto-3 or Gunner at Level 45 and cannot upgrade further. Its upgrade key is I when upgrading from either tank.

Design

The Auto-4 possesses four Turrets each spaced 90° away from each other. Each turret has two small cannons on them aligned like those of a Twin that, while idle, face forwards.

Technical

The Auto-4 rotates independently of autospin, and its rotation speed is slightly slower than a tank in autospin mode. The turrets automatically attack nearby attackables, but they cannot attack targets that are behind them. The cannon pairs on each turret alternates firing between right and left. The fire rate of each cannon is about that of a Basic, and the bullets fired by each cannon are slightly smaller than that of a Gunner.

Activating autofire causes turrets closest to the cursor to attack the cursor's position. Turrets behind that position behave as usual. Activating override stops the turrets from firing outside of autofire. By default, autofire and override can be activated by pressing the E and R keys on computer, respectively.

Strategy

• Strong Against: Multiple enemies coming from different directions, fast tanks, tanks with low Reload.
• Weak Against: High DPS tanks, Drone classes.

As the Auto-4

• The Auto-4 is a great tank for farming Polygons thanks to its turrets automatically aiming and shooting, as well as them having a good overall rate of fire.
• Inexperienced players using this tank should stay away from Director branch tanks because the turrets do not target these drones. Due to this, the drone tank can easily overpower and kill you.
  • However, more experienced players can evade or outrun the drones and kill the enemy tank before they die.
  • Also, by turning on Autofire, the player can aim some of its turrets at the drones. This is especially useful when fighting an Underseer branch tank such as the Necromancer.
• Upgrading Movement Speed, Reload and Bullet Speed is usually a good idea.

Against the Auto-4

• Players should use a bullet spammer tank such as the Triplet with many points invested in Movement Speed when fighting the Auto-4. They should dodge the Auto-4's small bullets at all costs when fighting them, as they can easily cripple them.
• Using a drone class, such as the Overlord

Trivia

• The twin Auto Turrets used by the Auto-4 are exclusive to Arras.io, meaning that they do not exist in Diep.io.
• The Auto-4 is one of two tanks that have unique Twin-barreled Auto Turrets, the other being the Auto-Smasher.
• The Auto-4 is one of the six tanks in Arras.io to have Autospin enabled by default (not counting Arms Race tanks). The other five are the Auto-3, Auto-5, Mega-3, Architect and Banshee respectively.

Gallery