Summary: It is arcade feeling because you can't wander around the levels freely, you have to go on a set path, but you can move up and back at your own pace (except when the level gives you a timer for some spots). You MUST play co-op. It is way more fun with co-op: I got this and tried playing through it on my own and got stuck only a couple times, but never got into it enough to beat it. Then my brother came over for a long weekend and we beat it twice!
Summary: My Son and I love playing this game. It's simple straight forward rail shooter thats great fun. No its not like CoD which is nice I like those games as well but this is simply a nice change up from those.