A medley that attempts to capture the apotheosis of Hiroyuki Sawano's "ətˈæk 0N tάɪtn" from the anime of the... well, somewhat the same name, by incorporating elements from all versions of the song from the first three seasons (and more) into a massive, multifaceted remix/mashup of the piece in question.
This mashup also features guest leitmotifs interwoven into and alongside the main melody, such as "Apple Seed / YouSeeBIGGIRL/T:T," a segment of "K21," and what I can only refer to tentatively as "Marco's Theme" without spouting the eldritch gibberish that comprises Sawano's OST track titles.
Additionally, this draws from the OST from the television show "Thunderbolt Fantasy," also composed by Hiroyuki Sawano. The style of its soundtrack and Attack on Titan's gel incredibly well to the point of being nigh-indistinguishable.
All music used belongs to their respective owners; all rights reserved; yadda yadda.
Apologies for the low quality of the video itself; I had to make do with Clipchamp to export this, then made the mistake of using the film grain filter at 480p. Never again.