Dwarf Fortress is a single-player fantasy game. You can control a dwarven outpost or an adventurer in a randomly generated, persistent world.

Although Dwarf Fortress is still in a work in progress, many features have already been implemented.

Features:
The world is randomly generated with distinct civilizations, dozens of towns, hundreds of caves and regions with various wildlife.
The world persists as long as you like, over many games, recording history and tracking changes.
Command your dwarves as they search for wealth in the mountain.
Craft treasures and furniture from many materials and improve these objects with precious metals, jewels and more.
Defend yourself against attacks from hostile civilizations, the wilderness and the depths.
Support the nobility as they make demands of your populace.
Keep your dwarves happy and read their thoughts as they work and relax.
Z coordinate allows you to dig out fortresses with multiple levels. Build towers or conquer the depths.
Build floodgates to divert water for farming or to drown your adversaries.