Retributor

 is a tier 5 tank that upgrades from Constructor, Annihilator and Conqueror at Level 60.

Design
Like the Conqueror before it, the directly incorporates its branches' guns, The  has a Constructor barrel on the front and an Annihilator barrel on the back. It is essentially a wider-barreled Conqueror.

Technical
Like Conqueror, it has a special control scheme where both of its barrels are separated. Its Annihilator barrel fires on left click and its Constructor barrel fires on right click.

As the

 * Using the heavy recoil of your Annihilator barrel to boost the speed of your blocks is quite powerful if done correctly.
 * If you are adept enough, you can fire a block (or more, depending on reload), then flip around to fire an Annihilator bullet. This effectively doubles your damage output but is quite hard to pull off correctly.
 * This also leaves you unable to recoil boost as in the first strategy, but the recoil of both barrels firing in the same direction can propel you backwards quite quickly.

Against the

 * Both of its barrels have somewhat low reload which leaves some openings for your attacks to get through.
 * Beware that both of its projectiles are devastating on hit, more often than not one-shotting most targets. Avoid all of its projectiles at all costs.