This beat sheet was replicated and slightly paraphrased from horror author T.L. Bodine's blog, as Bodine in turn adapted the Blake Snyder beat sheet for the horror genre specifically.

I can imagine this working for even non-horror that has horror elements, for example, the third act of Mistborn (overall framing: high fantasy evil-Overlord-toppling adventure) which I felt was a bit of a Charlie Chaplin chase scene but also works as a horror. I also think of the stage/movie musical Sweeney Todd in which, while the overall framing is that of a tragic hero (fatal flaw leads to his downfall and destruction of all those loved ones for whose sakes he turned into a monster in the first place), the character of Johanna finds herself at the intersection of four different horror movies. (Kath Steele on YouTube can describe it better here.)

While I haven't made too rigorous an analysis or comparison, I do think that there must be some creepypastas I like or short horrors that don't fit into this template. However, I replicated it here because a short horror muse that visited me recently only gained my commitment by introducing a Monster to turn the premise into a plot, and the Monster is the thing around which this beat sheet is structured, so I figured that I would refer to it.

Act One (The Pledge)

The World is Not What it Seems - The reader catches an early glimpse of the monster, or a hint that the monster exists. (Also theme stated.)

Putting the Players into Action - Introduce the important characters and the primary internal conflict.

Setting them on the Path - The choice, unknowingly or knowingly, that sets the character or characters on a course towards the monster.

First Encounter - The characters meet the monster, but are unaware of the true threat it poses.

Act Two (The Turn)

Shyte Gets Real - First death, or seriously spooky activity says this danger is evident and unavoidable.

The Chase - The characters lack the skills to fight the monster, and the monster pursues and/or attacks them.

Level-Inappropriate Second Encounter - The main character, without yet possessing the ability to destroy the monster, attempts to destroy the monster.

The Darkest Hour - The link between the internal conflict and the monster becomes clear, all hope is lost, and the main character has run out of obvious options.