Halo: Some textures go white and the demos option in the main menu is gone. Significant slowdowns in co-op.
Halo 2: Noticeably lower frame rate in four player split-screen. Content Downloader for getting new map packs doesn't work in 60Hz along with the upgrader. Occasionally, 'ghost' images stay on screen unless console is reset, usually after a cutscene. Note: Upgrades now run through Xbox 360 system instead of Xbox upgrade system, so will work in PAL60 now. Dolby Digital sound cuts out when playing across system link.
Me: No thanks.
http://en.wikipedia.org/wiki/List_of_Xbox_games_compatible_with_Xbox_360#List_of_compatible_titles








