It looks like a Returnal PC port has been all but confirmed. Essentially, there's a SteamDB page called 'Oregon' that includes a bunch of tags that point to a Returnal PC port. These include Tower of Sisyphus, Third-Person Shooter, Sci-Fi, Bullet Hell, Female Protagonist, and Online Co-Op. That's a pretty convincing list of tags, and it should come as no surprise to anyone who has been keeping tabs on Sony's plans for the PC platform as a whole.
This also comes after the game had appeared in the Nvidia GeForce leak last year, which has proven to be very accurate on titles releasing on PC.
Why are PlayStation 5 titles coming to PC?
Because there's a lot of money to be made. Horizon: Zero Dawn, Days Gone, and God of War's releases on PC have made a combined total of $108.9 million, which is excellent for a bunch of games that have been out on the PlayStation 4 for many years at this point. Sony is expecting to make a lot of money on PC, this year as well: about 300 million, which is over triple the PC net sales of last year. That means we should be expecting a lot of new titles from Sony on PC, with Returnal probably being one of them.

Another point in its favor is that Sony lists Returnal as one of its pieces of 'Incredible Content', which makes sense considering its 86 score on Metacritic and OpenCritic. It also just received two awards at The Finnish Game Awards, which goes to show how much Returnal has resonated worldwide.
Basically, Returnal is a very good game. While it never popped off like a lot of PlayStation exclusives have, it can receive a second life on PC, where a Returnal PC port would undoubtedly do pretty well. Besides, at this point for Sony, it's essentially found money. Why not put their games on PC? At the moment, their plan seems to be to give their exclusives a year or two of exclusivity on PS5, and once sales dwindle to almost nothing, they release them on PC for some more dough. It's a seemingly sound strategy that Sony has stumbled onto, and they look to be taking full advantage of it.
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