More than 500 workers behind the popular video game franchisee “World of Warcraft” are unionizing. The game’s development team employees — which include designers, engineers, artists, quality assurance testers and more — are joining the Communications Workers of America. Microsoft subsidiary Blizzard Entertainment, World of Warcraft’s publisher, has recognized the union. The newly-formed guild also builds on an expansion of organized labor seen among Microsoft video game workers since the tech giant’s $69 billion purchase of Activision Blizzard last year. CWA says that more than 1,750 video game workers at Microsoft now have representation with the union.