Yes, the traditional Forgotten Realms world. Current play is in Faerun. What makes this different is not only the amount of “authorized” material available in the world but also the shear number of quests and plotlines available. Characters are free to do anything including destroy a city. However, any changes the characters make to the world are permanent – meaning that if they destroy Waterdeep, that city will remain destroyed for future players and campaigns. Changes and political events occur whether the players are part of them or not and they may suddenly find themselves swept up in a war where another hero or party leads the front. If the players turn left, instead of right, an entire city may be quarantined and die from a disease because the heroes weren’t there to save the day…and they may not get the chance later on.