The final load test... The war between the Human Empire and the Dark Territory has engulfed Underworld entirely. The battle has shifted course with the Dark Territory army led by Gabriel, who seeks to capture Alice, the Priestess of Light, against Asuna and the Human Empire forces fighting to save Underworld. 
 
As Kirito's consciousness remains buried in a deep sleep, Gabriel, standing in as the Dark God Vecta, has recruited thousands of American players to log in to Underworld to annihilate the Human Empire forces. Meanwhile, Asuna, Sinon, and Leafa have joined the battle utilizing three super-accounts of the deities of the Underworld. As the Goddess of Creation Stacia Asuna fights alongside the Human Empire forces to take on the American players in a vicious combat. Sinon, who has gained the super-account for the Sun Goddess Solus, is in pursuit of Gabriel, who has abducted Alice, while Leafa arrives to Underworld with the super-account Earth Goddess Terraria. 
 
But that is not all... 
 
The impassioned speech by Lisbeth has convinced many ALO players to join the fight with the Human Empire despite the risks. With this great war, not only Underworld's continued existence, but the bottom-up artificial intelligence, the ultimate AI, and even the future of mankind is at stake. 
 
Though he has yet to awaken, only one man holds the fate of this world: the Black Swordsman. 
 
(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

Aniplex

A-1 Pictures

EGG FIRM

Aniplex of America

Sword Art Online: Alicization - War of Underworld Part 2