Most original Xbox games can be played on the Xbox 360 console. Shenmue 2 is one of them games which will work, I have even played it myself. I am not sure what you mean by backwards compatibility. If you mean by the region disks, a PAL game wont play on a other region xbox.
No, an Xbox 360 game will not run on an original Xbox.
If it is an XBOX 360 game then it will work on any XBOX 360 console.
Unfortunately, it does not work on the xbox 360.
All regular old XBox games work on the XBox 360
yes
Yes because its a xbox 360 game so it shall work on all xbox 360
Yes it will.
any original xbox game will work on the 360 as long as you have a hard drive
Put the game in.
Yes, it will work. I have an xbox 360 and ! always play normal xbox games on it.
Some Xbox game do work, and some dont.