WOT is exclusively for pc (and is to be followed by an aircraft and a ships version). It's a great game, if you a. Like tanks, b. don't get hung up on historical accuracy and c. accept that the pure free-to-play approach won't get you a Maus fast. In fact, if any toy soldier manufacturer did a Maus, it would probably cost you that much to get one in-game in a reasonable amount of time.
On multi-platform I'd recommend Battlefield 3.