Does anyone else here play Dwarf Fortress?
For those of you who haven't heard of it, it's a free game, downloadable here. It's still not completely developed, but it's already loads of fun. I think some of you will like it.

The main part of the game is Fortress Mode, a strategy/city building game, where you take a group of seven dwarves (more come later), give them some skills to survive, have them build a fortress in a randomly generated world, full of randomly generated monsters and civilizations. If you're lucky, your game will end with a gory bloodbath. If you aren't, it will end with starvation and dehydration. But most likely, it will be a mix of the two.

The other, less developed mode is Adventure Mode, in which you play an adventurer who travels around the world, killing monsters. Of course, many players prefer to slaughter townspeople instead.

There's also Legends mode, which lets you view the randomly generated history of the world, as well as the history you've added through gameplay.

The wikipedia article is here.
The forums (I'm on there, under the name "BodyGripper") are here.