Guitar — Hero Iii: Legends Of Rock Free Full Game...

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:

A massive overhaul that adds new songs, characters, and menus, available for both PC and PS3 (via emulator) . 2. Modern Alternatives Guitar Hero III: Legends of Rock Free Full Game...

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. If you are looking for the "full game"

While there is no official "free" version of Guitar Hero III: Legends of Rock from Activision, you can access the game or its content through several safe, community-driven methods for PC. community-driven methods for PC.