Dwarf Fortress

There's casual games, and there's serious games.

Then there's hardcore games.

Then there's Nintendo hard games.

Somewhere beyond that, there's Dwarf Fortress.

Even if you don't intend to play the game (and we won't think any less of you if you don't), at least read the stories that have come from people who have played the game.

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Links

 * Dwarf Fortress official website
 * Dwarf Fortress wiki
 * 51ppycup Dwarf Fortress video tutorial series
 * The Saga of Boatmurdered a succession game chronicled on SomethingAwful
 * sup/tg/ archived threads about Dwarf Fortress