Many years ago I played that game. My son was really into it, had the Maus and some other sweet tanks until they nerfed the special edition prototype E-25 tank destroyer. It was fast, low profile, and reloaded fast. You could ram dudes in the tracks all while blasting away. So of course that went bye bye. They release powerful tanks, people buy them cause their awesome, and then they get nerfed so me and the kid quit playing video games altogether.
Myself I preferred World of Warplanes and I did the whole beta test run of it and acquired a bunch of planes but lost them all once the full version was released, which kind of annoyed me. My favorite plane was the spitfire with all the equipment except the best gun. The best gun put you in a higher caliber of planes and made the plane worthless but in the level below that I owned the skies. 4-5-6 even 7 kills in a match once. So maneuverable.