- Launched in 2004, the massively multiplayer online role-playing game (MMORPG) World Of Warcraft is one of the most popular computer games in history, attracting more than 100 million registered players within its first decade
- Ozzy starred in a commercial for the game in 2008, where his status as The Prince of Darkness is challenged by one of the game’s major villains, the Lich King
- The following year, at WoW developer Blizzard Entertainment’s annual BlizzCon celebration, Ozzy surprised attendees with a live concert