Sword Art Online: Alicization - War of Underworld é um anime no formato série de TV que estreou em outono (outubro) de 2019, produzido pelo estúdio A-1 Pictures.

Sobre a produção: a história vem de um light novel, são 12 episódios de cerca de 24 minutos e o status atual é "finalizado".

Os gêneros principais são ação, aventura, drama, fantasia e ficção científica, com temas como Virtual World, Swordplay, Artificial Intelligence e Video Games.

No AniList, Sword Art Online: Alicization - War of Underworld tem nota média de 75%, uma nota muito boa, e está na lista de 224.960 usuários.

A franquia tem continuação ou história anterior: Sword Art Online: Alicization e Sword Art Online: Alicization - War of Underworld Part 2.

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)

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