Guild Wars 2 will receive its 'first major game release' on October 22, when the "Shadow of the Mad King' is unleashed to coincide with Halloween.
According to the official blurb, "Shadow of the Mad King is the first major game release for Guild Wars 2 and will go live on October 22. This new game update will include a number of new features for all of our players to enjoy, new content to explore and see, and a week-long Halloween event."
Players will see Tyria "transformed with decorations, new mini-games, new dynamic events, and more",
The developer adds, "Despite the celebrations there are those who dread the coming of Halloween and all that it may bring, for it is the time of year when barriers between the realms are weakest. Be prepared for an epic adventure in four acts starting October 22 and running until October 31."
More info on the official site.