Games Like Sonucido: Dreams of the Gray God by Daniel da Silva

Sonucido: Dreams of the Gray God by Daniel da Silva is a turn-based Horror Dungeon Crawler RPG.

Decades ago, Sonucido was a prison dungeon. After this punishment was abolished under the rule of the mage, Sonucido was mostly barren. Weird creatures still lived there, thieves started to use it to smuggle illegal wares.

But something kept brewing in the ancient halls, something old was still waiting there. Nowadays, the thieves avoid it, the council ordered guards to keep the entrances safe. There are rumors that the dungeon is crawling upwards, and is twisting its corridors. Old maps are utterly useless. And then there are the nightmare fuel stories about the creatures. Restless sanguinary atrocities.

Your group decided to explore the dungeon to find something to sell, an artifact, anything.

It's not illegal, just stupid. The city even gives you some equipment in exchange for information when ... if you come back.