NeverWinter Nights. An RPG game made by BioWare. It's pretty decent, and they made a native Linux client too (although they did end up taking their sweet time with it). It's currently a bit hard on my GeForce 3 with the details turned up. I haven't gotten into it too much.. maybe I should. My roommate, MattWiseass, was like crazy-addicted to it for months, so it's probably a good game. Although, it seems like Matt can get addicted to almost any game sometimes...