Dwarf Fortress is the kind of deeply simulated videogame where a cat can wander into a tavern, step in booze, get drunk by licking its paws and then vomit booze-puke all over the floor. Caves of Qud is the kind of deeply simulated videogame where you can use a can of "spray-a-brain" to turn an inanimate object like a wall sentient, at which point it can move, talk, fight, and become your companion if you're able to beguile it.
