No.
No, you can only play co-op online in Saints Row The Third.
Saints Row The Third does not support cross-platform co-op.
yes
saints row 2 does not have 2 player mode but it does have a co-op mode thats online that you could play with your freinds or with other players in playstation network or Xbox live
Yes, you can just play co-op. :)
Yes, you just cant play co-op.
Yeah its split screen and you can't leave each others sight for more than 5 feet. The co-op mode is terrible.
it doesn't ruin saints row 1 because it's a whole different thing it doesn't matter what you do in saints row 1 it's completely different to saints row 2.
yes you can play online go on websites and look it up
It's primarily a single player game, but does have co-op multiplayer.
no , yes you can it even says you can on back of saints row 2
No you can not only online co-op.