Guild Wars 2 developer Arenanet is offering a free trail for the MMORPG, and it will last for a whole week.
The week-long trial stars at 12AM PDT tomorrow, September 25, and ends at 11:59PM PDT October 1.
Your existing trial account, if you have one from any previous trials, should work for this as well. And if you don’t, you’ll just need to create an free trial account through here, and download the game from here.
Everything should be available for you to play, barring some restrictions on chat and sales/trades.