Are there physical copies of this game for PC?
Yes there is a physical copy but it's a goddamn joke. All it comes with is an 8mb installer for Steam, so have fun downloading the entire game anyways!
As for the game itself, I found some of the acting kinda strange, especially after having just come from Peace Walker (or having watched someone else play it). I guess the characters changed quite a bit in those 9 years (Ocelot is looking to be my favorite character so far just because he has personality while the others just seem to have issues). I was also pretty confused, as Snake stated that he was 'already a demon' despite having done nothing other than bringing Miller back to Mother Base (Not a spoiler, it's pretty much the first thing you do in the game after the hospital section). Would've been more appropriate if Snake had... well... kicked a dog or something beforehand.
On a side note, before I went to bed Yesterday I chose free roam Mother Base instead of a mission just so I could look at some of the tech trees. It's good for players who want a bit more of the backstory to listen to conversations soldiers have around MB, as they discuss things like how he became to be known as 'Big Boss'. Useful if you don't want to go looking through spoiler-tastic wikis and such.
I'd also like to note that while Rocket League recognizes that I'm using a PS4 controller, MGSV does not recognize it as one.