Dwarf Fortress is the only game in the world that fully emulates an entity on the very brink of complete insanity.
There's no other way for me to get at the core of it. Even without the input that we, the players, provide, you have dwarfs who go on murderous rampages because their pet kitten was crushed in a bridge that was intended to keep out a band of 20 goblins who all happen to be on !!FIRE!!. Or you'll be working on getting your farming and brewing industries going when you suddenly discover a cyclops in some random unused room in your fort, who then proceeds to rip the arm off the dwarf who discovers him and beats another 4 dwarfs to death with it. You'll have a dwarf gather piles of gold, jewels, adamantine, steel, and a goddamned bone and he'll have made a single bone crown with an engraving of itself that is worth less than the sum of it's materials, meanwhile the next guy makes a massive golden statue of his pet cat.
And then you introduce the player into the mixture and it's like taking an incredibly unstable substance, and introducing it to every set of variables that could lead to it's combustion, simultaneously.
DF as a game is the equivalent of sitting down and having a conversation with the homeless guy in the park who screams about flying children trying to rip his skin off.