Engilord

The  is a Testbed Misc tank.

Design
The tank is a transforming tank but it does not have the typical red/blue indicator. Rather, its two forms look identical to the tanks they are based on, the Engineer and the Overlord. When pressing the transform button, the Engineer's barrels slide out counterclockwise and fall to the tank's body, morphing into the Overlord's spawners. The reverse happens when transforming from the Overlord to the Engineer form.