Atlus and Ace Team today announced that Rock of Ages, their latest strategy, tower defense title, is no longer available only for the Xbox 360. The game has been released for the PC via Steam, and will be coming soon to the PlayStation Network. As players progress through the nearly two dozen stages, they’ll tour through five distinct periods of art history, encountering an assortment of famous historical and literary characters, outlandish and inspired defensive units, and fantastical bosses therein.