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 links each floor to another, and the stairways exists as dungeons where large numbers of monsters roam. The «Teleport Gates» of every unlocked cities are connected to one another.

Known Monsters

 * Kobold
 * Illfang the Kobold Lord (Boss of the 1st Floor)
 * Lizardman Lord (Level 78)
 * Frenzy Boar (Level 1)
 * Ragout Rabbit (Super Rare)
 * Dusk Lizard
 * Demonic Servant
 * The Geocrawler (Boss Monster of the 56th Floor)
 * 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

Re-appearance
At the end of Fairy Dance, with the sprouting of « Seed », Aincrad re-appears in the skies of ALfheim Online. It is currently being cleared by guilds and the like, led by high level players like General Eugene.