Your progress, achievements, and Gamerscore sync via the cloud as long as you use the same Microsoft account.
The "cross-buy" buzz originally came from a 2016 pre-order promotion where digital Xbox One buyers received a free Windows 10 code. quantum break cross buy
Despite not being cross-buy, the game does support functionality between the Xbox console and the Microsoft Store/Xbox App version for PC. Your progress, achievements, and Gamerscore sync via the
The Steam version of Quantum Break does not support cross-saves with the Xbox console version. 🎮 How to Play on Both Today quantum break cross buy
Quantum Break is a standard Xbox Play Anywhere title. This means buying it once on the Xbox Store does not automatically grant you the PC version (and vice versa) under normal circumstances.