- Panzer Dragoon Orta (awesome visuals, best rail-shooter ever)
- Jet Set Radio Future (the gameplay is brilliant and arcadey, the soundtrack is awesome, the style is UBER-COOL)
- Ninja Gaiden (one of the best games I've played IN MY LIFE)
- Jade Empire (one of the most compelling stories in a videogame, almost infinite playability)
- KOTOR & KOTOR II (KOTOR II has infinite replayability, IMHO)
- Lego Star Wars (a good, FUN game - great to play with friends)
- Halo (Halo 2's good if you have X-box live, or if you system-link all the time, otherwise, don't bother)
- Project Gotham Racing 2 (a great game to get into, but only if you like racers)
These games alone make the machine worth buying, even this late in the game, and I'm sure there's many others (like Fable) which are just as good.