Probably Metal Gear Rising on Revengeance difficulty. Didn't S-rank it, though. I'm not
that crazy.
Just for reference what that means if you played MGR on Normal:
- You take 8 times as much damage
- Nanopastes only heal 75% and will use multiple if you take more damage in one hit (As in you have 200% Health and 5 pastes. You take a 300 damage hit. You're down to 75% health and 3 pastes.)
- Enemies do not wait their turn and will attack together
- The enemy layout is the Very Hard layout which introduces Gekkos and Fenrirs in the tutorial
- ...and the chapter 2 boss has a second GRAD in it
- You cannot lose to win the initial phases of the final boss, you have to win by timeout
- You do, however, do ridiculous damage off a perfect parry
To say there's a difficulty spike there is underselling it. Getting out of the tutorial is one of the hardest things in the entire game. The chapter 2 boss goes from a walkover to one of the most menacing things you'll ever fight. The very final phase of the final boss is amazing, though. QTEs count for the damage boost off parries, so you and he are probably as evenly matched as it's going to get. Hitting that final hit on Revengeance was so satisfying. The game had sent its worst, and was found wanting.
If you want to try this I got a tip that'll help. There are two kinds of common enemy. The ones you can freely cut and the ones with armor. So a fully upgraded Armor Breaker is a great weapon to bring. Use the Murasama for boss fights, but the Armor Breaker on normal enemies so you can break them and cut them.