Sword Art Online

The Sword Art Online watch order runs through all four main arcs — Aincrad and Fairy Dance (Episodes 1-25), Phantom Bullet (Episodes 26-49), Gun Gale Online Alternative, and the sprawling Alicization saga — plus the Ordinal Scale movie and a stack of specials. Start with Episodes 1-25, then the lighthearted Sword Art Offline specials and Extra Edition before jumping into Episodes 26-49 and Sword Art Offline II. Watch Sword Art Online: Ordinal Scale next, since the film bridges into later events, followed by the Fatal Bullet entries and the Gun Gale Online Alternative run of Episodes 1-12. Alicization comes last: Episodes 1-24, the Recollection and War of Underworld Reflection specials, then War of Underworld Episodes 1-12 and its recap. This is the complete chronological order including all movies and OVAs, so you always know exactly where each special and film fits between the numbered episode blocks.