It was confirmed last week that Remedy's upcoming game Quantum Break would not only be coming to the Xbox One, but also the PC, however for the PC release there will not be many options on where to get the game. Quantum Break will not be coming to Steam at all, and instead will be a Microsoft Store exclusive.
This news has been revealed via the Major Nelson Podcast that released on February 12th. In the podcast Larry "Major Nelson" Hyrb had Xbox Games head of marketing Aaron Greenberg on the podcast to talk about the upcoming time-bending third person shooter.
Aaron Greenberg has this to say:
"Quantum Break on Windows 10 is a Windows Store exclusive."