Only On Xbox, game list.
 

Ok I don't know if this list is right as it's off Teamxbox's forums I will make a post just after this saying what I think ouf each game on the list.

Currently Released Titles (NTSC):

Airforce Delta Storm
Apex
Azurik: Rise of Perathia
Blinx
Blood Wake
Bruce Lee: Quest of the Dragon
Buffy: The Vampire Slayer
Chase: Hollywood Stunt Driver
Circus Maximus
Crazy Taxi 3: High Roller
Crimson Sea
Dead or Alive 3
Dead or Alive: Xtreme Beach Volleyball
Deathrow
Fuzion Frenzy
Gun Metal
Gunvalkyrie
Halo
House of the Dead 3
Jet Set Radio Future
Kabuki Warriors
Kakuto Chojin
Kung Fu Chaos
Mad Dash Racing
Mech Assault
Metal Dungeon
Morrowind
Moto GP
Murakumo
NBA Inside Drive 2002
NBA Inside Drive 2003
New Legends
NFL Fever 2002
NFL Fever 2003
Nightcaster
Nightcaster 2
Oddworld:Munch's Oddysee
Panzer Dragoon Orta
Phantom Crash
Project Gotham Racing
Pulse Racer
Quantum Redshift
Sea Blade
Sega GT 2002
Serious Sam
Shenmue 2
Shrek
Sneakers
Star Wars: Obi Wan
Steel Battalion
Superman: The Man of Steel
Toe Jam & Earl 3: Mission To Earth
Transworld Snowboarding
UFC: Tapout
Unreal Championship
Whacked
World Series Baseball 2K2
WWF: Raw Is War

Airforce Delta Storm = good
Apex = good to very good
Azurik: Rise of Perathia = very poor
Blinx = good
Blood Wake = ok to good
Bruce Lee: Quest of the Dragon = very poor
Buffy: The Vampire Slayer = good
Chase: Hollywood Stunt Driver =poor
Circus Maximus = ok
Crazy Taxi 3: High Roller =very good
Crimson Sea = good
Dead or Alive 3 = very good
Dead or Alive: Xtreme Beach Volleyball = ok
Deathrow = good
Fuzion Frenzy = good
Gun Metal = good
Gunvalkyrie = very good (but to hard for some).
Halo = very good
House of the Dead 3 = very good
Jet Set Radio Future = very good
Kabuki Warriors = very poor
Kakuto Chojin = ok
Kung Fu Chaos = very good (only with 4 players)
Mad Dash Racing = ok
Mech Assault = very good
Metal Dungeon = poor
Morrowind = very good
Moto GP = very good
Murakumo = ok to good
NBA Inside Drive 2002 = not played
NBA Inside Drive 2003 = not played
New Legends = ok
NFL Fever 2002 = not played
NFL Fever 2003 = not played
Nightcaster = very poor
Nightcaster 2 = poor
Oddworld:Munch's Oddysee = ok
Panzer Dragoon Orta = very good
Phantom Crash = very good
Project Gotham Racing = very good
Pulse Racer = ok
Quantum Redshift = good
Sea Blade = not played
Sega GT 2002 = good
Serious Sam = very good (where did the Gamecube version go)
Shenmue 2 = very good
Shrek = ok
Sneakers = poor (And I can't read Jap)
Star Wars: Obi Wan = very poor
Steel Battalion = I can only wish I had this!!!!!
Superman: The Man of Steel = not played
Toe Jam & Earl 3: Mission To Earth = good
Transworld Snowboarding = very good
UFC: Tapout = not played
Unreal Championship = very good
Whacked = very poor
World Series Baseball 2K2 = not played
WWF: Raw Is War = not played

There you g0 a fast run down of what I think of most of the "only on Xbox" games out so far! remember this IMO.

Oh and some more games starting with Enclave as swing ship or what ever they were called went under, making Enclave Xbox only

Enclave = good (but again seem to hard for some people, don't know why).
Amped = ok to good
THPS2x = good (don't really know if this is an exclusive or not it is just a mix of THPS 1 and 2)
Rallisport Challenge = very good