Atari and Wizards of the Coast announce that development is complete on Neverwinter Nights 2: Storm of Zehir, and Obsidian Entertainment's now-gold D&D RPG expansion will be available worldwide sometime next month. Here's a bit about the add-on: "The 20 to 30-hour campaign in Neverwinter Nights 2: Storm of Zehir introduces new classes, including the fearsome Hellfire Warlock and the daring Swashbuckler, as well as brand-new spells, creatures, and playable races. Fans of the compelling multiplayer features of Neverwinter Nights 2 will be able to play through Storm of Zehir's campaign in the online cooperative mode, while modders can use the included editor to create their own campaigns and Overland Maps to share online."