Kirito, Eugeo, and Alice. Six months have passed since the two disciples and an Integrity Knight brought down the pontifex, Administrator. With the fighting over, Alice has been living in her hometown of Rulid Village. Beside her is Kirito, who has not only lost his arm and soul, but also his dear friend. As Alice devotes herself to looking after Kirito, she too has lost the will to fight she once had as a knight. 
 
Nevertheless, the time for the final stress test – one which will engulf the entire Underworld with tragedy – draws relentlessly closer. 
 
Meanwhile, in the deepest areas of the Dark Territory, the Dark God Vecta has resurrected, as if to have waited for this very moment. Leading an army of dark forces, they begin their invasion into the human empire in hopes of attaining the Priestess of Light. The human empire force led by the Integrity Knight Bercouli prepares for a war of an unimaginable scale against the army of the Dark Territory. Even then, Alice is nowhere to be seen, nor the two heroes that saved the realm... 
 
(Source: Official Website)

Episode 1 - The World of Swords

Episode 2 - Beater

Episode 3 - Red Nosed Reindeer

Episode 4 - The Black Swordsman

Episode 5 - A Crime Within the Walls

Episode 6 - Illusionary Avenger

Episode 7 - The Temperature of the Heart

Episode 8 - The Sword Dance of White and Black

Episode 9 - The Blue-Eyed Demon

Episode 10 - Crimson Killing Intent

Episode 11 - The Girl of Morning Dew

Episode 12 - Yui's Heart

Episode 13 - Edge of Hell's Abyss

Episode 14 - The End of the World

Episode 15 - Return

Episode 16 - Land of the Fairies

Episode 17 - Captive Queen

Episode 18 - To the World Tree

Episode 19 - The Lugru Corridor

Episode 20 - General of the Blazing Flame

Episode 21 - The Truth of ALfheim

Episode 22 - Grand Quest

Episode 23 - Bonds

Episode 24 - Gilded Hero

Episode 25 - The World Seed

A-1 Pictures

Aniplex

Sonilude

Sword Art Online: Alicization - War of Underworld