From CVG:

I don’t know what Apple was considering before they started working with us, and I’m sure that there were conversations on both sides. I think they saw that we were the company with the most reverence for what they were doing – we’re not looking to turn a quick buck on The Beatles. This is something we’ve loved and respect and would not want to screw up.

We were terrified while making the game, hoping we don’t make them mad at any point – they’re really nice and easy to work with, but this is The Beatles, you can’t afford to mess this up.

We’ve all been in meetings with clients that have made us nervous, but imagine the pressure of facing the remaining Beatles. Kudos to Harmonix for not breaking down and sobbing right before showing off their first game concepts to Paul McCartney and Ringo Starr.