World of Tanks Goes Retail and IGS partner to distribute World of Tanks boxed version today announced a partnership with Interactive Gaming Software publisher (IGS) on the distribution of World of Tanks, a free-to-play MMO game based on massive numbers of armored battles. In World of Tanks, 30-player teams are fighting action-packed PvP battles. The game features more than 150 armored fighting vehicles from the pre-WW2 era up to the Korean War: light, medium, heavy and super heavy tanks, tank destroyers, self-propelled howitzers and rocket artillery. World of Tanks will hit the store shelves across the United States later this year.