I definitely don't remember them all, but here are some of the more remarkable, from the top of my head:
- Turok: Evolution (Classic Turok, none of that reboot nonsense)
- Conker Live and Reloaded (Lost its magic compared to the N64 version. I'd recommend the latter now that XBL is gone for the former.)
- SW: Jedi Starfighter (very fun, if short and easy)
- SW: Clone Wars (VERY fun, if a bit hard and too varied)
- SW: Obi-Wan (a bit awkward, but pleasantly challenging)
- SW: Battlefront II (The first one was a lot better, if a bit limiting. I blame the playable heroes.)
- BLACK (quite the FPS. Sometimes excruciatingly hard, but very pleasing to play.)
- GTA III and GTA: Vice City (if you have no opinion formed on these, it's not me who'll get you some)
- MechAssault and MechAssault II (the second one is a lot more polished and the MP is more fun, alas XBL is gone. However, both have very consistent SP experiences. I recommend a play-through, if only rented)
- Need for Speed: Underground 2 (your common arcade racer, with some very hood customization options)
- Crash Bandicoot: The Wrath of Cortex (never got around to actually 100%ing it. I suppose it is pretty much the same as the other incarnations.)