Blizzard developers working on Hearthstone and Warcraft Rumble have formed a new union, the latest in a series of labor wins at the Microsoft-owned studio. The over 100-person unit is represented by the Communication Workers of America (CWA), and counts “software engineers, designers, artists, quality assurance testers and producers” among its members.
Inspiration to form the new union came from the successful organizing efforts of Blizzard’s World of Warcraft workers last year. The staff behind the classic MMO formed the Warcraft Gamemakers Guild last year, and were followed by similar unions representing developers working on Diablo and Overwatch earlier in 2025. According to the CWA, over 1,900 workers at Blizzard
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