Sorry if this isn't the place to ask or if it was answered earlier, but is there any local (even if you have to be online) co-op modes?
Is there an single player story mode or is it like GW1?
Good news: There's a big single-player mode attached to an overworld. Bad news: It's a confusing, badly paced, horribly written, simplistic mess. (I go into great detail about it in my review at Ars, linked above.)