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...
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Dwarf Fortress & Caves of Qud roundtable: The masters of simulation talk roguelikes, AI and making the infinite compelling
Source: PC Gamer (opens in a new tab)