Why can’t I play with three guitars in The Beatles Rock Band?

The Beatles: Rock Band does not support playing with three guitar parts at the same time.

The game combines multiple guitar parts from each song into a single playable guitar track. This was done to match the available instrument roles in the game.

In later Beatles recordings, songs often include multiple layered guitar parts and other instruments. Since the game supports only Guitar, Bass, Drums, and Vocals, these parts are merged into one guitar experience.

Note: The game introduces support for three-part vocal harmonies instead of adding additional guitar roles.