Flank Guard

The Flank Guard is one of the four basic upgrade choices from the Tank and can be selected at level 15.

The Flank Guard upgrade adds another barrel behind the tank which shoots projectiles at the same rate as the front one. The Flank Guard may further upgrade into the Quad Tank, Tri-Angle or Twin Flank.

Design
The Flank Guard features a circular base with a rectangular barrel on the front and an additional smaller rectangular barrel on the back.

Strategy
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