I've totally written a phrase like this before.

And in this context, literally yes that's what it sounds like. The .ani file can contain multiple animation sequences that each have a name.

Maybe it's British English? I would use the wording like that. But I'm German. However, a "benannte Animationssequenz" is a perfectly valid construct in German, and doesn't sound weird at all given the context.

Uh, that would be a reference to the text at the beginning of that section

> Anything that moves is stored in an .ani file which is a sprite sheet and named animation sequences.

Yeah they could be indexed rather than named what's supposed to be the problem here

I think it's funny when people show poor knowledge of English grammar and confidently label their own exposure gap as a flaw.

Maybe it's a bit stuffy or formal, but yes, "the named sequence" is 100% something a real English speaking human would write. And if it's a sequence of frames forming an animation, it can absolutely be a named animation sequence.