Hi, do all the xbox games need to be burned on dvd-r media, or can some of them be burned on cdr?

Has anybody made a list of what game needs what media.

I'm getting a modded xbox this week, & was thinking of also getting a dvd burner, but if I don't need to burn all the games on dvd-r I might not bother paying out £250 for a burner I might never use.

Thanx in advance

:D

Some can be burn on cdr and other need to be on dvdr.