One of the best-written stories in video games, though that comes with a few drawbacks; first off, forget about the combat, which has little-to-no actual depth to it. Quite a few potential combat scenarios can be avoided through talking it out though, so make sure (and this is ESSENTIAL) to put most of your skill points into Wisdom. Be ready for text dump upon text dump, and concepts far beyond conventional thought. This is Planescape: Torment.