So, how do I engage in PvE? I read the guide and it makes sense, really. I imagine the best way to learn is to get in there and do it. I usually don't like PvE, but killing tyranids ought to be fun and if it gets you lots of XP/Req I think it'd be a good place to start. So, how do I get into it? I don't recall seeing it as an option in the HUB.