While at a procedural generation shindig for ProcJam, roguelike developer Darren Grey answered a question about games which have characters who interact with one another and not the player. A member of the audience suggested Din’s Curse and Depths of Peril.
“I don’t know how interesting that is – having things interacting with each other – especially if they’re out of your sight. What does it matter? A game should be player-centred in my opinion. I’m not interested in what goes on behind – simulate it. make it up, it doesn’t matter. As long as the player feels like they’re getting an interesting experience.”