Sword Art Online S4E20 E20

Season 4 · Episode 20

Sword Art Online: E20

First aired 2020-08-30

Watch S4E20

Alice and Asuna head to the World’s End Altar as Kirito confronts Gabriel. Unless he can defeat Gabriel and return to the real world before the maximum-acceleration phase begins, Kirito will have to spend the next 200 years in the Underworld.

Sword Art Online — Season 4 Episodes (23)