Atari and Wizards of the Coast have announced that Storm of Zehir, the second expansion pack for Neverwinter Nights 2, has shipped to retailers. Thanks: Blues. Neverwinter Nights 2: Storm of Zehir features full party customization, dungeon crawling, and free exploration of a non-linear game world via an Overland Map. The storyline foreshadows the events that take place in the Forgotten Realms from the Fourth Edition of the Dungeons & Dragons Role-Playing Game, released in June 2008.