A massive overhaul that adds new songs, characters, and menus, available for both PC and PS3 (via emulator) . 2. Modern Alternatives

A massive mod for the World Tour PC port that allows you to import the entire GH3 setlist and play with improved graphics and features. 3. Legacy Downloads

If you are looking for the "full game" experience with modern improvements, fans have created standalone installers that simplify the setup on modern Windows systems:

The community has largely moved toward open-source engines that are and support all songs from the original Guitar Hero series:

This is the most popular modern successor. You can download the engine for free at clonehero.net and then add "song packs" that contain the entire Guitar Hero III setlist.

This is considered the definitive way to play Guitar Hero 3 on PC. It is a modded version that fixes common bugs, improves performance, and is often distributed as a pre-packaged installer.