The World of Warcraft Trading Card Game (WoW TCG) was a collectible card game based on Blizzard Entertainment's MMORPG, World of Warcraft. The game was announced by Upper Deck Entertainment on August 18, 2005, and released on October 25, 2006. Players can fight against each other one-on-one, or can join others in order to defeat raid bosses based on those in the MMORPG. In March 2010, Upper Deck Entertainment lost the License from Blizzard Entertainment.