Why do I need to link my accounts to access online services in Rock Band 4?

Epic Games acquired Harmonix in 2021. As a result, Harmonix games are now part of the Epic Games ecosystem.

To use online services in Rock Band 4, you must sign in with an Epic Games Account and link your platform accounts. For more details, refer to the Harmonix account linking FAQ (Opens in a new tab).

This connection allows your account to access online features across supported platforms