Good live games with guest?

Can someone give me a list of games that have a guest ability for live? I already have gears and halo 3 so I know they have it, but what other good live games have this?

I would like to know this too.

Bump

Ghost Recon 2 is good. GOW and halo 3 arent good split screen as gears you need the hight but it doesnt give you it, halo goes abit wierd so thats annoying.

Fifa08 and smackdown are good co-op or vs as you get to see the whole screen still (ie not split screen)

Xbla - Assult heroes i really fun with a mate