Every one of em considering that I don't really play games for the challenge. I don't find insane difficulty for the sake of difficulty fun. For most of the most challenging games the challenge is about the only thing they have going for em. Would I like to play Nioh? Yeah, sure. It seems like it has a cool world and interesting story. But I don't find the insane difficulty fun. I can play challenging games if they're fair, but making games both hard and fun beyond difficulty for difficulty's sake is beyond what most developers are capable of or willing to put the care and time and effort into. Otherwise we're left with the nut-crunching difficulty of games like Dark Souls. DS and Bloodbourne look like they have interesting worlds with interesting lore, but it's a backdrop to the challenge. And the difficulty alone doesn't do it for me.
I played the recent Doom and it's difficult but the gameplay loop bored me pretty quick. It wasn't the fights themselves I couldn't handle, it was the dull repetition. There are few ultra challenging games to pick from, but there are even fewer games that offer crazy difficulty that I'm willing to put up with for some other reason like story or exploration or something. I think Baldur's Gate comes to mind. It's easy to power play Baldur's Gate (especially if you use hacks and mods) but I first played through both games without cheating and having no real idea what I was doing and it was fun. Myst and Riven are also challenging because the puzzles can be pretty mindboggling, and they're my oldest favorites because the environments, story and world design really appeal to me.
