Twin

The  is one of the four basic upgrade choices from the Tank and can be selected at level 15. The Twin upgrade adds an additional barrel to the tank, increasing its reload. The Twin may further upgrade into the Triple Shot, Quad Tank or Twin Flank.

Design
The Twin features a blue circular base with a two rectangular turrets on the front side by side.

Offensive
The Twin tank is like the machine gun: It has the advantage of reload speed. Capable of fighting certain Tier 3 tanks with relative ease due to its double fire-rate.

Strategy
The twin has a decent DPS (Damage Per Second), but unlike the quad shot or twin flank upgrades, it only shoots in one direction, making it vulnerable to bullets from behind. With it's good penetration, it can be used as a counter to the sniper. Flank guards are considered weaker than it and machine guns are debatable.

Trivia

 * The twin has also different shooting mode which can be accepted as minor bug. Its standard shooting mode is alternate shooting from one of the two barrels. If clicked once left mouse button and then begin to hold it, your tank will shoot two bullets together instead of alternating shots. This is also a good defense strategy for some players.