Activision and Vivendi Games aren't expected to merge their businesses in any official capacity until next month, but that hasn't stopped the two gaming giants from getting a jump on comingling their brands. Activision and Blizzard announced today that Level 70 Elite Tauren Chieftain's "I am Murloc" will be available as a free downloadable track for the PlayStation 3 and Xbox 360 editions of Guitar Hero III: Legends of Rock beginning June 26.

　　First performed by "Blizzard Entertainment's house band" at BlizzCon 2005, "I am Murloc" parodies the mysterious race of fish-people that count themselves denizens of Azeroth. The thrash metal song debuts as Blizzard gears up for its Worldwide Invitational 2008 in Paris, France, this weekend, where the developer has fueled speculation that it will be making a major announcement.

　　World of Warcraft joins an elite few set of games that have been given the rhythm-game treatment. Previously, the main themes from Bungie's Halo 3 and Sony's God of War have been released as free downloads for Guitar Hero III. "Still Alive," the cult-hit ending credits theme to Valve's award-winning puzzle-platformer Portal, was handed out gratis for MTV Games and Harmonix's Rock Band.