World of Tanks is new MMO action game announced just recently by WARGAMING.NET. The game would be focused mainly on PVP battles with wide range of modes like quick random battles, mini-missions, clan wars and more.
World of Tanks is promised to be free to play so I presume many people will try it. The game will feature variety of tank models from different historical events and countries.
Tiger tank, Soviet T-34, American 155mm M40 Gun Motor Carriage are some of the models mentioned on the press release.
Site: http://www.worldoftanks.com/