Microsoft Studios VP Phil Spencer has admitted the company "lost our way a bit in supporting Windows games," promising the company will be "doing more stuff" on Windows.
"Windows is incredibly important," he said. "The 'One Microsoft' mantra that's come out had us looking at all the devices that Microsoft builds and truly becoming a first-party gaming studio across all devices. You'll see us doing more stuff on Windows.
"At the launch of Windows 8, we had about 30 games in the Windows Store. A lot of those you'd consider lightweight or casual games... But we've covered all of that property now. Now we're starting to look at bigger and core gamer things. I'm excited by that.
"For us, we're first-party across all Microsoft devices. We definitely think about ourselves that way in our studios. If you think about a service like Spotify or Netflix, you expect that service to work on any device you have. For some games, it will be similar.
"I just want to have an Xbox Live account and it works on my phone, on my console, and my Windows machine. And then I'll be able to access my content in a screen-appropriate way."
Xbox exclusive titles confirmed for PC already include Titanfall and Project Spark.