2013 DreamHack Counter-Strike: Global Offensive Championship
The 2013 DreamHack SteelSeries Counter Strike: Global Offensive Championship or simply DreamHack Winter 2013 was the first "" to be sponsored by Valve. The competition was held during the Winter 2013 DreamHack digital festival at the Elmia Exhibition and Convention Centre in Jönköping, Sweden. Six invitees joined ten qualifiers to form the sixteen team event. Community funding helped to build the US$250,000 prizepool. The tournament had a peak 145,000 concurrent viewers on twitch.tv and the in-game viewing client.
ESL (company)
ESL worked with publisher Valve Corporation in August 2015 for ESL One Cologne 2015 at the Lanxess Arena where 16 teams competed in Counter-Strike: Global Offensive. ESL implemented randomized drug testing at the event. All tests came back negative. The tournament had over 27 million viewers, making it the largest and most-watched CS:GO tournament at that time.