Illustration by Alex Castro / The VergeMore than 500 developers at Blizzard Entertainment who work on World of Warcraft have voted to form a union. The World of Warcraft GameMakers Guild, formed with the a**istance of the Communication Workers of America (CWA), is composed of employees across every department, including designers, engineers, artists, producers, and more. Together, they have formed the largest wall-to-wall union — or a union inclusive of multiple departments and disciplines — at Microsoft. This news comes less than a week after the formation of the Bethesda Game Studios union, which, at the time of the announcement, was itself the largest wall-to-wall Microsoft union. In a statement emailed to The Verge, Microsoft spokesperson Delaney Simmons wrote, “We…