Deep Silver. The publisher.
4A literally had no idea. They were still working on the Steam build this afternoon until their publisher pulled the carpet from underneath them. Literally just a couple of hours before the announcement.
Deep Silver are scum.
I refuse to believe that 4A Games had "no idea". Of course they were still working on the Steam build, because there is still a Steam version of the game that lots of people will be playing, just not one that can be purchased by new customers for a year.