Dwarf Fortress is a freeware computer game by Bay 12 Games set in a high fantasy universe that combines aspects of roguelike and city-building games. It’s the obsessive-compulsive opposite of Dwarven Glory’s minimalist ethos and is thoroughly awesome.
The best introduction to Dwarf Fortress might be Tim Denee’s illustrated Bronzemurder and Oilfurnace series of illustrations. The Boatmurdered chronicle is also well worth reading. These tales provide valuable insight into the fragile dwarven psyche.
Also worthwhile is a visit to the Dwarf Fortress Wiki, which contains useful gameplay tips (as well as gruesome combat mechanics and ubiquitous alcohol dependency).
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