Twitch will broadcast over 20 Blizzard tournaments and exclusive content through 2018.
Hearthstone also set another new record when the Journey to Un'Goro expansion launched in April.
Hearthstone's Jason Chayes on how Blizzard is changing eSports.
Blizzard has evolved from a tiny self-starter to a gaming juggernaut.
The company explains that there has been some 'occasional confusion and inefficiencies' over the years.
The latest interruption follows a week of technical issues with the developer's servers.
'Gaming servers are a top target of DDoS assaults,' Imperva security researcher Ofer Gayer told IBTimes UK.
The hacker group had claimed responsibility for the recent attack on Pokemon Go servers.
"You can't arrest a lizard," AppleJ4ck told IBTimes UK.
Fable franchise revived by Flaming Foul Studios in collectible card game form for Xbox One and PC.
Microsoft and Mojang have confirmed plans to create a version of the game tailored for the Chinese market.
Blizzard president Michael Morhaime says they will work with Twitch to tackle the issue.
Gaming giant promises to bring live Hearthstone and Heroes of the Storm competitions to Facebook.
The digital card game hit the milestone just ahead of the launch of its third full-sized expansion, Whispers of the Old Gods.
The project was officially announced in December 2010 and remained under wraps before it was ultimately cancelled in September 2014.
Hearthstone's upcoming expansion will be released on 26 April.
Apple logos and T-shirts go green as developers donate proceeds to help WWF's global efforts.
The cyberattack shut down all Blizzard servers but the problem has now been resolved.
Announcement made during London Games Festival eSports summit.
Post acquisition, Activision expects its combined revenue to reach $6.2bn.
Symantec advises players to avoid downloading third-party add-ons for Hearthstone.
A look ahead at the changes being made to the pro-gaming scene in 2016.