Dwarf Fortress.
http://www.bay12games.com/dwarves/Most incredible game ever, only no/minimal graphics.
Here's one of the floors of my current underground empire -

I'm currently posting a security squad around a dude who is in a "Strange Mood" and trying unsuccessfully to build a magical artifact in a craftsdwarf workshop. There is the distinct possibility that he will go on a berserk killing spree if he is not supplied promptly with turtle shells. *sigh*
If he goes off his nut, they'll taze him, bro.
I am also building a tower with windows made of gemstones for no reason other than to be horribly ostentatious and attract goblin attacks, only to be sliced to ribbons by a series of traps using razor sharp disks, ala Last Crusade.