Sword Art Online

Intro Aincrad from the first season of Sword Art Online. Aincrad is the world set as the stage for Sword Art Online declared to be the world's first VRMMORPG in history. Aincrad is an iron-and-stone made floating castle that has about ten kilometers floor base diameter and consists of a hundred floors stacking straight upwards, meaning that each floor's diameter is a bit smaller than the previous one. On each floor, there are a couple of large cities along with countless small scale towns and villages, forests, plains, and even lakes. Only one stairway links each floor to another, and the stairways exist beyond the boss room of each Labyrinth. The Teleport Gates of every unlocked cities are connected to one another. Created by Kayaba Akihiko he has trapped everyone logged into the opening day of the games release and now you and many others are stuck unable to log off until level 100 is reached and the boss killed. To make it worse if you die in the game you die in real life. Good luck.