Obscura

Under the mountain there's a market where anything can be bought and sold, and everyone wears a mask to hide who they are. You're not a merchant or a tourist there. You're desperate, and desperate people don't get to be picky about who they trust.

The strangers you meet can guide you through the market toward whatever it is you've come for, but their help is never free of angle. Every one of them has secrets and ambitions of their own, and none of them are obligated to keep your interests above theirs. Getting through means figuring out who's actually pointing you somewhere useful and who's leading you into a worse room.

Choices steer which of these strangers you lean on and what you're willing to trade for their help, and the market doesn't forgive bad guesses gently. Some paths end badly on purpose, and the game keeps a record of the different ways things can fall apart. The setting stays grim and transactional throughout; nobody here is generous for free.