Aspyr Media, in partnership with Activision, today announced that the third iteration of the Guitar Hero franchise, Guitar Hero III: Legends of Rock, will be available to PC and Mac gamers this fall. Being developed and published by Aspyr, the PC and Mac versions will match their console counterparts with new content and features, including a multiplayer battle mode, boss battles, unlockable content, 3D rock venues and more than 70 classic and modern rock songs. Expanded online multiplayer game modes will also allow PC and Mac users to go head-to-head against players around the world and across either platform. Guitar Hero III: Legends of Rock on PC and Mac is rated “T” for Teen by the ESRB, and will be available this fall.