My sister mentioned a game we played a few years ago and neither of us can remember the name and it's going to bother me until I find it. It was an app, rouguelike and offline, not mmorpg, and it had a style kind of like don't starve. Here are some random details
The first room of the dungeon was a merchant and every either 50th or 100th dungeon was a boss. There was no way to go back up a level once you went down. The only way to escape was to find an escape scroll in a pot. To bring things with you out of the dungeon they have to be gold or make them gold with an angel statue. There are secret rooms that can be found when a wall sparkles. Inside are two chests and stairs. Sometimes there were letters but I forget what they said.
It's not any of the pixel dungeon games although those seem to be the closest I can find. I don't expect for it to be found but that would be cool if it was