Gamers who like shredding aliens and guitars take note--Gigantour is coming. The mostly outdoor heavy-metal rock tour is being headlined by vets Megadeth and has added an unlikely partner to its bill--Epic Games' Gears of War. The Xbox 360 title is scheduled to be released this holiday and pits man against invading insectoids bent on wiping out humans. The festival begins in early September and will hit 25 venues before wrapping up a month later. Also confirmed for the shows are Lamb of God, Opeth, and Arch Enemy. For more information, check out the tour's official Web site.