- War Of Underworld | Sword Art Online: Alicization

Episodes 1–24. Ends with the battle against Administrator.

Episodes 25–47 (often split into Part 1 and Part 2). Plot Arcs & Synopsis Sword Art Online: Alicization - War of Underworld

The "War of Underworld" sub-arc is divided into two main parts: Episodes 1–24

Canon film that introduces technology and characters relevant to Alicization . and key characters.

Establishes Kirito, Asuna, and the core cast.

Sword Art Online: Alicization - War of Underworld is the climactic second half of the Alicization arc, adapting volumes 15–18 of the light novels. This guide covers the essential watch order, plot arcs, and key characters.