I dunno if most people would consider this a tank, but it's based off of the Landmaster from Starfox Assault, which was called a tank, so I unno.

But, it has a big ol' cannon and a coaxial gatling gun. It's run by a single pilot behind some kind of transparent protective thing. energy shield? Dunno.

The wheels spread out to lower it to the ground when it needs to go faster, and pull in to raise it up on rough terrain, and it probably has some kind of thrusters on the back or something for the really high speed stuff.