Aincrad

Aincrad is the first « Realized World » shown in the « Sword Art Online » light novel series.

Background
Aincrad serves as the setting of the first ever VRMMORPG « Sword Art Online ». It has a hundred floors.

It was incorporated in « ALfheim Online » on May 2025.

Etymology and Meaning
A «Realized World» called An Incarnating Radius; the name has been abbreviated as Aincrad. It is also inferable that its design is symbolic for time and space. the vertical axis representing time and the circular floors representing space.

Geography
The diameter of the base floor Aincrad is about 10 kilometers, and it consists of a 100 floors stacking straight upwards. Inside, there are couple of large cities along with countless small scale towns and villages, forests and plains, and even lakes. Only one stairway linked each floor to another, and the stairways existed in dungeons where large numbers of monsters roamed. The «Teleport Gates» of every unlocked cities are connected to one another.

Known Monsters

 * Lizardman Lord (Level 78)
 * Frenzy Boar (Level 1)
 * Ragout Rabbit (Super Rare)
 * Dusk Lizard
 * Demonic Servant
 * The Gleameyes (Boss Monster of the 74th Floor)
 * The Skullreaper (Boss Monster of the 75th Floor)
 * Feathery Dragon
 * Drunk Ape
 * Frost Bone
 * The Fatal-scythe. (Boss of the Black Iron Castle [Hidden])
 * Nicholas the Apostate

Known Plants

 * The Flower of Pneuma