Guild Wars 2 is a free-to-play, massively multiplayer online role-playing game developed by ArenaNet and published by NCSoft. it is now available on the Steam platform. here is a guide on how to log in to your existing Guild Wars 2 account through Steam.
Adding the Launch Argument
Add the following text in the “Launch Options” box;
This will load the standard launcher instead of the Steam launcher, and allow you to sign in with your existing account details.
Guild Wars 2 10th Anniversary Event is now out via Steam. you can check out the detail from Steam.