I like games where you explore big dungeons. Megadungeons, in TTRPG terms. I always find them comfy, oddly. Ultima Underworld, Arx Fatalis, Grimrock on the more modern side of things, just for another example. Doesn't have to be first person or a blobber.

What are some good retro games with this vibe? I'd prefer at least some kind of context or excuse plot/verisimilitude for the sake of comfiness, so Nethack and most other roguelikes are out. Also doesn't have to be a 'dungeon' dungeon, per se. Like honestly I'd consider Resident Evil 1 almost close enough. You're in a big spooky area exploring it.

Also did all ye olde Wizardrys so yeah. No need to mention those.