From April 19-21, 2013, ArenaNet
is hosting another Guild Wars 2
free trial weekend - if you played in the previous free trial weekend in November 2012, your former free trial account will be active for the April 19-21 event. To prepare, just update your game client by double-clicking the Guild Wars 2 icon on your desktop, or go to this page
and sign in to download and install the game again.Here
you can find details on how to get free trial serial codes.