Why would you want to play through steam? What's the difference? I mean you're going to be launching the same game (probably with the same launcher) as you are now but by clicking on an icon on steam. I don't get it either. I know Steam has it's own friends list so I guess it makes it a bit easier to add people you know in real life or from other games, but I don't see why it would be so important to some people to go through a 3rd party to launch the same game they've already got.Because people got shit loads of money on Steam through stuff like CS:GO boxes and they would be willing to spend that on GW2, at least that's my reason.