As long as the game and the xbox has the same region encoding then yes you can
Yes you can play American Xbox 360 games in Australian but only on Australian Xbox consoles. Although there is a way you can play American Xbox games on an Australian Xbox. It can be done by getting your Australian xbox chipped/modded so you can play any region games and even fake/burnt games.
If Australian games are the region PAL then yes.
You can not play xbox 360 games on an original xbox, however you can play some original xbox games on an xbox 360 console.
Yes you can play Xbox 360 games on the Xbox Original
No they do not, but you can play certain Xbox original games on Xbox 360
You can no longer play original Xbox games on Xbox Live.
A long time ago, you could only play some xbox original games. Now, I believe you can play any original xbox games.
No, you cannot. The "Original" Xbox cannot play Xbox 360 games. However, a list of "original" Xbox games are playable on the 360.
The Xbox 360 can play original Xbox games but the Xbox doesnt play Xbox 360 games.
Yes, you need a hard drive to play original Xbox games because the hard drive contains the emulator that allows the original Xbox games to play on 360
Xbox live was on the original Xbox, meaning that there are several games which you can play online. Halo was the most popular game on the xbox. You can still play these games but noone will be playing them as the Xbox 360 has more and latest released games. Also, you cannot play Xbox 360 on the original Xbox, FACT!
Yes. All original Xbox games are compatible with the Xbox 360. However, you cannot play an Xbox 360 game on an original Xbox, or course.