2/10 for the following reasons:
Co-op: Having both online and split screen co-op in a crappy game like this is rather impressive. I've played more popular games that did one or the other, but not both. I also liked how in split screen, I didn't have to move player 2 at all to progress the story. It's so annoying having to constantly move the 2nd player forward while going for co-op achievements in games that are split screen only.
Collectibles: This game handled collectibles well. Easy to find, kept track of how many you had, and it saves them as soon as you pick them up. No need to worry about re-collecting them if you die before the next checkpoint. Again, many more popular games dick this up so I was surprised they got this right.
Beyond that, it's a steaming pile of shit with no redeeming qualities at all. Nothing fucking works in this game, the levels are HUUUUUUUUUGE and way too confusing, and the story and dialogue are about porn quality.