I just bought an xbox 360 bundle. I have a lot ( over 20 ) old xbox games, but I can't seem to play them on my xbox 360. How do I get my old xbox games to play on the new 360? Secondly, does the xbox 360 play high definition dvds ( hd-dvds )?

I think you have to download something, emulation, and install it to play your old games. I think it does play hd discs blu-ray is for the playstation.

Not all old xbox games work on the 360, look at this list to see which ones are backwards compatible:
http://www.xbox.com/en-US/games/back...ygameslist.htm

Do you have Xbox Live? You may be able to download updates. Like posted above, only certain games will work.

all dvd games can be played on your new xbox, that's why they call it xbox 360 it means all of dvd games or even psp1 and psp games can be played. you have to download the updates for your xbox 360.