So, FYI, if any of you guys are going to play Nioh at any point in time, don't quit the game when the end credits start rolling. Not just because there is a ton of after-game content (like, an insane amount of content), but because the main story actually has one more mission after the credits. I found Yamato no Orochi to be a really cool looking final boss (it's basically the Japanese version of Hydra), but surprisingly easy relative to a lot of other bosses in the game. However, the real final boss of the game, Hundred Eyes, was quite challenging. I took me about seven or eight tries to beat him, which isn't out of the ordinary for a Team Ninja game, but to be honest I bitched out and spammed my Guardian Spirit (basically this game's version of Devil Trigger) in his final phase to kill him, which I don't exactly feel great about, but I'll eventually redo that fight once I get better at the game. All of his attacks are incredibly deadly, and he becomes insanely aggressive on the third phase of that fight, so you really can't approach him without being ready to dodge away at a moment's notice.
Anyways, now that I've beaten the main story, I can say with certainty that this game made my PS4 purchase worth it. That said, it doesn't hurt to have a shit-ton of other great games on the console as well.
I'll be giving Nioh it's own thread soon enough, but suffice it to say that with all of the people I've seen praising both The Legend of Zelda: Breath of the Wild and Nier: Automata as modern masterpieces, I absolutely feel that Nioh deserves to be right there among them with that level of praise (and to be fair, it hasn't exactly done poorly with reviews or sales in any regard), and I'm saying that as someone who went into this game with a lot of skepticism given Team Ninja's dubious track record since Itagaki's departure nearly a decade ago.
While this game definitely takes a massive amount of Influence from Dark Souls, it really is to that game what Ninja Gaiden is to Devil May Cry, in that it's a brilliant, different take from a very different developer on the same general concept and formula of the Souls games. The general backbone is clearly that of Demons Souls or Dark Souls or Bloodborne, but the full product is an amalgamation of lots of other games as well, including the truly great stuff from Team Ninja's own roots. I highly recommend this title to anyone who finds any interest or appeal in its subject matter or gameplay style. It's not as good as it looks. It's quite frankly better.