What are some good games for the xbox?

I got an xbox for christmas (not a 360, a plain xbox) and I have played many games on one before, and I'm trying to figure out what games I should buy to start a small collection. My favorite games already are Star Wars Obi-Wan, Halo 2, Knights of the Old Republic, and Star Wars Battlefront. I'm getting those already. I've also got Munch's Odysee, which is a pretty cute little game in my opinion. So, are there any games related to the ones that I've named that are for the xbox that I may like? Thanks!