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
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. 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 mod for the World Tour PC
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"
Because the game is no longer sold digitally, it is often categorized as "abandonware."