This security method is to combat keylogging which allows hackers to gain account passwords.
The Authenticator was revealed in the Guild Wars 2 blog, which stated, ”We know customers also want a native implementation of two-factor authentication, and we want it too. This is an area where we should act faster as a company, and we’re going to. We had our own homegrown implementation of smartphone two-factor authenticator in testing, but we’re going to pull it back and instead integrate Guild Wars 2 with Google Authenticator, which already has robust authenticator implementations on most major smartphone platforms. We expect to roll this out in the next two weeks.”
Guild Wars 2 was released on the 28th August to a wildly positive reception, including a 9.5/10 score from Strategy Informer’s review.