since when did the 360 lose backward compatiblity? and who said you need HD for it to be backward compatible? are you saying this applies only to the arcade edition?
lol sorry i was reading it wrong... kept thinking you were saying HI def and now realize you meant Hard drive
you always needed a HD to be backwards compatible b/c the origninal Xbox had a hard drive and that is how they can emulate the old games on the 360. It has been this way since day one of the 360 launch. If they figured out a way to do it with out one, this is the first I've heard of it. The Xbox 360 Arcade (aka Core) edition is the only one that isnt backwards compatible b/c no HD. Buy a HD, then they are backwards compatible.