He wanders an endless labyrinth of cyberdungeons filled with concrete and steel, fighting off cyborgs and other bizarre silicate creatures. Everyone is searching for the Net Terminal Genes, but no one is quite certain what kind of power they contain. The answer may lie hidden among the scattered human settlements of this vast and desolate future world.

    But when the game goes live, the elation of the players quickly turns to horror as they discover that, for all its amazing features, SAO is missing one of the most basic functions of any MMORPG - a log-out button. Now trapped in the virtual world of Aincrad, their bodies held captive by NerveGear in the real world, users are issued a chilling ultimatum: conquer all one hundred floors of Aincrad to regain your freedom. But in the warped world of SAO, "Game Over" means certain death - both virtual and real...