Sword Art Online - Season 4 Episode 12
Watch TV Shows Sword Art Online HD 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.
- Year: 2020
- Country: Japan
- Genre: Animation, Sci-Fi & Fantasy, Action & Adventure
- Studio: Gunma TV, Tokyo MX, tvk, BS11, Tochigi TV
- Director: Reki Kawahara, Tomohiko Ito
- Cast: Yoshitsugu Matsuoka, Haruka Tomatsu, Hiroaki Hirata, Ai Kayano, Rina Hidaka, Hiroki Yasumoto