It's a fantasy role-playing game.

DM: You are Vax Vax'ildan, a half-elf rogue . You are the member of the famous group of adventurers. Previously, you scritches Keyleth behind the ear, nudging the heart aside with his toe, and then exits the temple. Simultaneously, Scanlan opens the door to magical laboratory, with a robed duergar inside.
DM: Okay, you make your way into what looks like a giant foyer, into a secondary entrance in the side of the fortress.
Player: I just walk all the way over to the corner, stealthing.
DM: Make a stealth check.
Player: It's high, it's 28.
DM: 28, got it, okay. So, as you make your way through, you eventually careen to this corner. You can see another hallway, what appears to be another room of some kind. You also glance back and see there are two sets of stairways that go up and down.
Player: What's behind me?
DM: This is a giant foyer that leads outside of the fortress.
Player: And the edge of the map this way?
DM: This way here? This way? This comes to an abrupt end at that point, a rocky wall into the mountain itself that it's buttressed up against.
Player: Okay, I'm gonna keep coming this way, stealthing.
DM: All right. As you move through--
