Zipper

The Zipper is a Tier 4 tank that upgrades from the Contagion and the Swarming Trapper at level 45.

Design
The Zipper has a round body. There's bit shorter and wider Trapper guns. There's also a small trapezoidal drone gun placed on the Trapper guns, like the Swarming Trapper's and a small Subduer secondary gun behind the Trapper launcher and the Cruiser drone barrel, like the Contagion.

Technical
The Zipper actually has no stat changes from its predecessors. The bullet has the Contagion's stats, the trap has the same stats of the Contagion and the Swarming Trapper, and the the swarm drone has the Swarming Trapper's (and the Cruiser's) stats.

Upgrades
The Zipper can upgrade from the and the  at level 45.

The Zipper can upgrade into the following:
 * (Lv. 60)
 * (Lv. 60)
 * (Lv. 60)

As the Zipper

 * The Zipper is literally the fusion of the Trapper, the Cruiser and the Subduer (Contagion and Swarming Trapper). Usee their strategies. However, you lose the main gun and the second swarm drone gun of the Subduer and the Cruiser's guns.
 * The Zipper has higher firepower thanks to its high-health and high-damage traps and the steadier fire of its bullet and swarm-firing barrels. However, its attacks aren't very fast.
 * By piling traps in an area, you can create walls of traps that will block any tank or bullet from coming through.
 * Since your swarms are very weak, do not try to defend yourself with them. Aiming away from enemy bullets then aiming at the enemy's body is an effective strategy, except for multiple barrel tanks such as Octo Tank.
 * You can chip enemies down with your swarms while your traps protect you from attacks.
 * If you don't want to use the drones much, press R (Override stops AI movement) and act like a normal Trapper with swarm drones coming from you.
 * You can confuse enemies as your Cruiser barrel and your Subduer secondary barrel is pratically hidden there.

Against the Zipper

 * At long range, only the Zipper's weak swarm drones / bullets with enough Drone / Bullet speed will be able to reach that far, making the Zipper ineffective there.
 * Powerful focused fire from tanks like the Twin will be able to outpenetrate both its traps and its swarms.