Its a demo of the full game.
Was excited to try, but it's not worth just trying.
It's one of those games you have to have the full version to experience it effectively.
No PVP, everyone who loves the game clearly wants this, and it looks like it has it, but it doesn't, co-op story only I believe which is a huge shame.
Best part of the experience, it looks/plays fantastic! That's about it though :p