[quote name='United_Korea']worst r&c game by far (haven't played the supposedly-worse full frontal assault), but for $7...[/QUOTE]
It doesn't stack up to the other R&C titles as a single player experience, but All4One was designed for co-op. I played through it with a buddy and had a good time.
I recommend cranking up the difficulty level. it's way too easy on "normal".