I've been having fun playing Mount & Blade off and on the last week or so. It has got a lot more going for it now than it did the last time I tried it a year or so back. http://www.taleworlds.com/

Tarn Adams has also put out a new update for Dwarf Fortress. Get your dwarf on here: http://www.bay12games.com/dwarves/dev_now.html