Agree with Jedi Outcast being an awesome game. It was, in my opinion, the coolest Star Wars game in terms of gameplay. The combat was fluid, and it made you feel like a Jedi. Never played KOTOR so don't know if that beats it.
The Longest Journey and Dreamfall are also games i'd really like to dive into, but it has kinda just disappeared from my radar.
Never played Alundra, but after a quick search it looks interesting. Something about it immediately reminded me of Wild Arms for some reason. Does it play the same way? Wild Arms is turned based btw if you didn't know, and its a great PS game.