I watched The Exorcist 1973 for the first time on Halloween night. Although it wasn't really my thing, I realised it's actually pretty similar to the climax and ending of Fazbear Frights.
The climax revolves around two characters (Everette Larson & Jake (the Stitchwraith)/Lankester Merrin & Damien Karras) entering the house of a parent (Dr. Talbert/Chris MacNeil) and having to defeat the demonic presence within their daughter ('Renelle Talbert' inhabited by the shadow, albeit it's an entity pretending to be Renelle/Regan MacNeil inhabited by Pazuzu)
The possessed daughter is laying down on something ('Renelle' on a table/Regan on her bed) and a strange fluid is coming out of her body as sort of an attack against the other characters (dark Remnant coming out of 'Renelle'/green slime coming out of Regan)
After one of the protagonists is incapacitated (Larson passes out/Merrin has a heart attack), the other protagonist has to defeat the demonic presence by allowing it to enter their body (Jake absorbs the shadow into himself in order to seal it inside a memory/Karras allows Pazuzu to leave Regan and enter his body before jumping to his death)
Some time later after the parent has reconciled with their daughter (Jake reunites Talbert with the real Renelle/Chris and Regan reunite), the parent gives one of the characters a silver medallion that was relevant to the climax and he's left to ponder it on the sidewalk (Talbert gives Renelle's heart pendant to Larson/Chris gives Karras' Saint Joseph medallion to Joseph Dyer (although in the Director's Cut which I watched Dyer gives it back))
I just thought those were interesting parallels. There could be more.