Coop System Link for some games

I'm just starting to know about this system link where games you could play online coop can be played coop via system link.

Now knowing this, I am kicking myself to think I missed out on some coop fun!!!

Could anyone here give me a couple of games that has coop via system link? Thank you and Merry Christmas! and a happy new Year!

I know Crackdown has one, but does Saint's Row?