''The House of the Devil'' is a 2009 horror film directed by Ti West and starring Jocelin Donahue.

In the 1980s, college student Samantha Hughes takes a strange babysitting job that coincides with a full lunar eclipse. She slowly realizes her clients harbor a terrifying secret. The film is notable for its convincing {{retraux}} evocation of old '70s and '80s horror movies.

!!This movie contain examples of the following tropes:

* ActionSurvivor: Samantha becomes one during the final 20 minutes or so, [[spoiler:killing both Victor and Mrs. Ulman after freeing herself from her bonds]].
* ArcWords: "Get a grip"
* AffablyEvil - Mr. Ulman. From beginning to end, he never stops being civil and personable.
* TheAntichrist - [[spoiler: Implied to be the endgoal of the cult.]]
* BigBad: Mr. Ulman is leading the cult.
* BigFancyHouse: The Ulman's house. Samantha spends a good deal of the film exploring it.
* BigNo: In the climax.
-->'''Mr. Ulman:''' It's your destiny to accept him.
-->'''Samantha:''' NO!!!
* BoomHeadshot: [[spoiler: Megan's death.]]
* BungledSuicide: [[spoiler: Samantha shoots herself in the head in order to prevent the birth of TheAntichrist. It doesn't kill her.]]
* DownerEnding: [[spoiler: Thanks to the Satanic ritual, Samantha is impregnated with (presumably) TheAntichrist. During her final showdown with Mr. Ulman, she shoots herself in the head to prevent the birth from happening. However, [[BungledSuicide it doesn't kill her]], and by the end of the film, she is comatose and still pregnant.]]
* EvenEvilHasLovedOnes: [[spoiler:Mrs. Ulman is genuinely grief-stricken when she discovers Victor's corpse.]]
* EyeScream: [[spoiler:Samantha rams her thumb into Victor's eye, presumably leaving him half-blind, as he grapples her.]]
* FauxAffablyEvil: Mrs. Ulman and Victor.
* HollywoodSatanism
* JumpScare: Victor Ulman's introduction. [[BoomHeadShot What he does later]] is an even bigger one.
** [[spoiler:Samantha's hallucinations of the priestess's face. '''''TWICE.''''']]
* KilledMidSentence: [[spoiler:Poor Megan.]]
* NobodyPoops: Averted. At one point Samantha goes to the toilet and her peeing is audible.
* NothingButHits - Three 80's singles are listened to by characters. "One Thing Leads To Another" by The Fixx is well-remembered enough to show up on many 80's hits compilations. On the other hand, "One Of Our Submarines" by Thomas Dolby and "The Breakup Song (They Don't Write 'Em)" by The Greg Kihn Band are a bit more obscure. All three of these songs were released within a few years of each other and would place the film around 1983 or so. And then the soundtrack also uses much more recent music by Gods Of Fire, which is just influenced by 80's metal enough to not stick out too much.
* NightmareFace - The priestess.
* NothingIsScarier - Most of the film follows this.
* ProductPlacement: When Samantha and Megan are eating pizza near the beginning, they are drinking from large Coca-Cola paper cups.
* ReligiousHorror
* SlashedThroat: [[spoiler: Victor Ulman.]]
* SlippingAMickey: [[spoiler:Victor Ulman poses as a pizza delivery worker in order to dupe Samantha into eating drugged pizza.]]
* StylisticSuck: The film was shot on 16mm film and was made intentionally to look like an old movie. Expect lots of grain and murky colors.
* WhamLine - "You're not the babysitter?" (It makes sense in context)
** We will take care of you. [[spoiler: Both of you.]]
* WhatHappenedToTheMouse: The fate of [[spoiler: Mr. Ulman]] and what exactly happened between [[spoiler: Samantha shooting herself and the final scene in the hospital]] is never elaborated on.
** [[spoiler: He likely died from getting stabbed in the stomach. He was shown leaking copious amount of blood.]]
* WouldHurtAChild