Slendytubbies

Five Nights at Freddy's (also FNaTI, FNaH, even FNiA - whatever)

Thomas the Slender Engine

Doors

Poppy Playtime

Bendy and the Ink Machine

Horror mods in Friday Night Funkin'

Baldi's Basics in Education and Learning (I guess...?)

Slendrina games

Silent Hill

Resident Evil

And so on...