Microsoft have surprisingly updated its list of backward compatible Xbox games with a plethora of new names.
The new Xbox games working on Xbox 360 are:
1. Tenku (Japan)
2. Avatar: The Last Airbender
3. Avatar: The Legend of Aang
4. Breakdown
5. Call of Duty 2: Big Red One
6. Call of Duty 3
7. Cars
8. Crash Bandicoot 5: Wrath of Cortex
9. Daisenryaku VII
10. FIFA Soccer 2007
11. Full Spectrum Warrior
12. Guilty Gear Isuka
13. Innocent Tears (Japan)
14. Jet Set Radio Future
15. King of Fighters 2002
16. King of Fighters: Neowave
17. Mad Dash Racing (Japan)
18. Mech Assault 2
19. Mercenaries: Playground of Destruction
20. Nascar 2006: Total Team Control
21. NFL Fever 2004
22. Oddworld Munch´s Oddysee
23. Panzer Dragoon Orta
24. Petit Copter (Japan)
25. Phantom Dust
26. Reservoir Dogs
27. Return To Castle Wolfenstein
28. Rugby League 2
29. Sengoku Warriors (Japan)
30. Sonic Riders
31. Soul Calibur 2 UPDATED
32. Spider-Man 2
33. Star Wars: Republic Commando
34. Street Fighter Anniversary Collection
35. Tiger Woods PGA Tour 07
36. Tony Hawk´s Underground
37. Ultra Bust a Move /ULTRA Pazzle Bobble
38. Unreal Championship 2
If you do not have Xbox Live at your disposal, you can download the official Xbox 360-compatible-game update from here. (BackCompat_04-2007.zip).