Neverwinter Nights 2: Storm of Zehir builds on the strong tradition of Dungeons & Dragons computer games by marrying old-school concepts like full party customization and dungeon crawling with new innovations, such as a fully 3D Overland Map feature which allows for free exploration of the non-linear game world. The gripping storyline foreshadows the events that devastate the land of the Forgotten Realms in the Fourth Edition of the Dungeons & Dragons Role-Playing Game, released in June 2008.

The Neverwinter Nights 2: Storm of Zehir Overland Map feature lets players explore the Chultan Peninsula and Sword Coast in a way never before possible in any Neverwinter Nights game. Players will explore well-known locations, like Neverwinter and Crossroad Keep, alongside lesser travelled areas, such as the xenophobic jungle nation of Samarach. Vicious monsters and groups of bandits populate the Overland Map, and the farther from civilization the player roams, the more difficult the encounters become.

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.