In Core Keeper, you’ll find several merchants around the depths who can shack up in your base. But to get them to move in, you need to build a “habitable room” and place their favorite items inside.

The survival-crafting game doesn’t exactly tell you what a habitable room is. If you’re like me, you’ve probably already tried a combination of objects. There’s a certain set of requirements you’ll need to meet when you’re building your room, though, and once you have the right furniture and design, the merchant will spawn almost instantly.