Sword Art Online - Season 4

Sword Art Online - Season 4

Season 4

Alicization - War of Underworld

* Based on Kawahara Reki's light novel series Sword Art Online.

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

Network
Datesoct. 5, 2019 - oct. 22, 2022
Previous Season

Episodes

In the Far North
Season 4Episode 125 min

In the Far North

Six months have passed since the fierce battle against Administrator. Alice has brought Kirito to her childhood home, Rulid Village, where they live peacefully. Gazing out at the world that she saved with Kirito, Alice reflects on all that's happened.

oct. 12, 2019
Raids
Season 4Episode 225 min

Raids

A force from the Dark Territory is attacking Rulid Village. Though she'd lost her purpose in battle, in order to fight for her family, and for the people that Kirito and Eugeo tried to protect, Alice takes up the Osmanthus Blade once again.

oct. 19, 2019
The Final Load Test
Season 4Episode 325 min

The Final Load Test

The mysterious group that attacked the Ocean Turtle turns out to be a secret unit under orders from the U.S. National Security Agency. And its leader, Gabriel, has battled Kirito and Sinon before.

oct. 26, 2019
Dark Territory
Season 4Episode 425 min

Dark Territory

Shasta, commander of the Dark Territory's dark knights, had intended to use Administrator's death as a chance for peace with the Human Empire. But his plans are thwarted by Emperor Vecta's return to the land of darkness.

nov. 2, 2019
The Night Before Battle
Season 4Episode 525 min

The Night Before Battle

Resolved to fight for humankind, Alice joins the forces of the Human Empire, bringing Kirito with her. But while the forces of darkness boast overwhelming numbers, only thirteen Integrity Knights are available to fight for the Human Empire.

nov. 9, 2019
Battle of the Knights
Season 4Episode 625 min

Battle of the Knights

The Final Load Test has begun, and the Eastern Gate has collapsed. Incited by Gabriel, now Emperor Vecta, the massive army of the land of darkness pushes on towards the Human Empire.

nov. 16, 2019
Stigma of the Disqualified
Season 4Episode 725 min

Stigma of the Disqualified

Integrity Knight Renly Synthesis Twenty-Seven, in battle for the first time, flees his position, allowing goblins from the forces of darkness to infiltrate to the tent where Kirito is.

nov. 23, 2019
Blood and Life
Season 4Episode 825 min

Blood and Life

The powerful formal art unleashed by the Integrity Knight Alice inflicts severe casualties on the forces of darkness. Alice encounters an enemy survivor and learns that Emperor Vecta's objective is to find the "Priestess of Light."

nov. 30, 2019
Sword and Fist
Season 4Episode 925 min

Sword and Fist

Upon seeing Alice, Gabriel orders his entire army to capture her. The pugilists guild races ahead of the main force. As Alice and Bercouli try to come up with a strategy to counter them.

déc. 7, 2019
Stacia, the Goddess of Creation
Season 4Episode 1025 min

Stacia, the Goddess of Creation

Asuna has logged into the Underworld using the superuser account of Stacia, the Goddess of Creation. After she descends, she is reunited with Kirito, thanks to Ronie and Tiese. But soon Alice arrives, leading to a precarious situation.

déc. 14, 2019
Heartless Choice
Season 4Episode 1125 min

Heartless Choice

Asuna has created a bottomless chasm. The dark knights and the pugilists attempt to cross over to the other side, where the Human Empire Army waits.

déc. 21, 2019
Ray of Light
Season 4Episode 1225 min

Ray of Light

Due to Gabriel's scheme, U.S. players were given black knight accounts, and are now continuously logging in to the Underworld. They begin mercilessly slaughtering soldiers from both the Human Empire Army and the Dark Territory Army.

déc. 28, 2019
The War of Underworld
Season 4Episode 1325 min

The War of Underworld

The ice sniper from Gun Gale Online, Sinon, successfully logon into Underworld using a super account Solus, the goddess of the sun, to help Asuna and Kirito inside the Underworld against tons of Crimson Army and The Dark Knight.

juil. 11, 2020
End to Eternity
Season 4Episode 1425 min

End to Eternity

Despite its modest size, the Human Empire Army and Asuna valiantly battle the wave of American players surging towards them. But they're hopelessly outnumbered, and the Human Empire soldiers start to fall one after another.

juil. 18, 2020
Instigation
Season 4Episode 1525 min

Instigation

Bercouli pursues Vecta, who's abducted Alice. After a long, vicious battle, Bercouli unleashes his secret sword skill, Uragiri, and finally defeats Vecta, despite having sustained severe injuries himself.

juil. 25, 2020
Code 871
Season 4Episode 1625 min

Code 871

The traitor inside Rath turns out to be a researcher named Yanai. When Higa attempts to restore Kirito, Yanai tries to thwart the operation by holding him at gunpoint. Meanwhile, in the Underworld, Sinon confronts Gabriel, who has logged back in.

août 1, 2020
Prince of Hell
Season 4Episode 1725 min

Prince of Hell

Asuna and the others succumb to Vassago and the Chinese/Korean players. Discovering the catatonic Kirito, Vassago kicks his wheelchair over. Enraged, Klein lunges at Vassago, only to be pinned down by enemy players. Just then, someone unexpected appears.

août 8, 2020
Memories
Season 4Episode 1825 min

Memories

Sinon manages to severely damage Gabriel, but her strength has been sapped. Leafa collapses after wiping out the American players. And Asuna, her situation now hopeless, gazes at Kirito. But the Black Swordsman continues to wander through his dreams.

août 15, 2020
Awakening
Season 4Episode 1925 min

Awakening

Escaping his nightmares, Kirito regains consciousness at last. With the Night-Sky Blade in his right hand and the broken Blue Rose Sword in his left, he faces off against Vassago, armed with the Mate-Chopper, now enormous in size.

août 22, 2020
The Night-Sky Blade
Season 4Episode 2025 min

The Night-Sky Blade

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.

août 29, 2020
Beyond Time
Season 4Episode 2125 min

Beyond Time

The maximum-acceleration phase has begun. Alice successfully logs out of the Underworld, but Kirito doesn't make it in time. In the real world, Higa and Kikuoka rush to shut down the STL, in order to disable the maximum-acceleration phase, but…

sept. 5, 2020
Alice
Season 4Episode 2225 min

Alice

The "Rath Attack Incident," masterminded by the American National Security Agency, is over. Now head of the newly formed Oceanic Resource Exploration & Research Institution, Rinko unveils Alice to the world as an authentic artificial general intelligence.

sept. 12, 2020
New World
Season 4Episode 2325 min

New World

Rinko informs Kazuto that Alice is missing. He's about to rush to the Rath Roppongi branch when the doorbell rings. In a panic, Kazuto throws open the door, only to find a deliveryman there with a huge cardboard box.

sept. 19, 2020

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