The May 2016 release of Overwatch was highly successful, and was the highest-selling game on PC for 2016.[61] Several traditional esport events had been established within the year of Overwatch's release, such as the Overwatch World Cup, but Blizzard continued to expand this and announced the first esports professional league, the Overwatch League at the 2016 BlizzCon event. The company purchased a studio at The Burbank Studios in Burbank, California, that it converted into a dedicated esports venue, the Blizzard Arena, to be used for the Overwatch League and other events.[62] The inaugural season of the Overwatch League launched on January 10, 2018 with 12 global teams playing.