I finally beat Fatal Frame 2 remake on Nightmare Mode... No camera upgrades, no charms, no special shots/filters to deal damage, and no shop items
I'll upload the Head Priest fight instead of Kusabi because I'll be honest: Kusabi was VERY easy relative to the other bosses in this challenge run. I have no idea why. The guy didn't go berserk once in my successful attempt but to be fair you CAN interrupt Kusabi if you get the good RNG (where the berserk has a wind-up instead of it being instant).
The head priest is easily the HARDEST boss of this run. Since I can't use special shots, if I let the priest go up the ceiling then I'm basically screwed since I have to use the blue filter to reach him. This entire fight hinged on me having enough type-61's and type-90's to immediately hit him with if he tries flying up. This also helps with preventing the other priests from appearing in phase 2.
This entire fight required a lot of execution. Phase 1 was fine enough. The priests are VERY annoying so it took time to figure out how to get around the arena and chip away at all of them with type-07 since I needed to save my heavy hitters for phase 2. Once the head priest is alone, he's free.
I'll reserve the Kusabi fight for the full video of the run (when I upload it)