My xbox originals games that works on the xbox 360 device are :

1. Black
2. Burnout 3: Takedown ;
3. Conker: Live & Reloaded ;
4. Counter-Strike ;
5. DOOM 3 ;
6. The Elder Scrolls III: Morrowind Game of the Year
7. Fable ;
8. Fable: The Lost Chapters ;
9. Fantastic 4 ;
10. Forza Motorsport ;
11. Grand Theft Auto III ;
12. Grand Theft Auto: Vice City ;
13. Grand Theft Auto: San Andreas ;
14. Half-Life 2 ;
15. Halo 2 ;
16. Halo: Combat Evolved ;
17. Jade Empire ;
18. LEGO Star Wars: The Video Game ;
19. LEGO Star Wars II: The Original Trilogy ;
20. Mercenaries: Playground of Destruction ;
21. Ninja Gaiden Black ;
22. Panzer Dragoon Orta ;
23. Prince of Persia: The Sands of Time ;
24. Rapala Pro Fishing ;
25. Return to Castle Wolfenstein: Tides of War ;
26. Shenmue II ;
27. Scarface: The World is Yours ;
28. The Sims 2 ;
29. Sonic Mega Collection Plus ;
30. Soulcalibur II ;
31. Spider-Man 2 ;
32. Spyro: A Hero's Tail ;
33. SSX 3 ;
34. Star Wars Battlefront ;
35. Star Wars Battlefront II ;
36. Star Wars Knights of the Old Republic ;
37. Star Wars Knights of the Old Republic II: The Sith Lords ;
38. Star Wars Republic Commando ;
39. Syberia II ;
40. Tom Clancy's Ghost Recon 2 ;
41. Tom Clancy's Splinter Cell Chaos Theory ;
42. Tony Hawk's Underground 2 ;

We can add the games only for xbox 360. For more links about xbox original games :

• The IGN's Top 25 Xbox Games of All Time (March 16, 2007) ;
• The MetaCitics's Top Xbox Games List ;
• The GameSpot's Top Xbox Games List ;