World of Tanks (WoT) is an armoured warfare-themed multiplayer online game developed by Wargaming, featuring 20th century (1910s–1970s) era combat vehicles. It is built upon a freemium business model where the game is free-to-play, but participants also have the option of paying a fee for use of “premium” features. The focus is on player vs. player gameplay with each player controlling an armored vehicle, from the interwar period to the Cold War era.