Be very afraid.
The first horror movie ever made was called Le manoir du diable (literally "the devil's manor") and came out in 1896. It wasn't exactly scary, but it's generally agreed that it earned the distinction thanks to its supernatural themes and the appearance of skeletons, bats, ghosts, and the Devil.
The genre has come a looong way since then and gained many fans over the years, which brings me to the point of this list. Whether you're a horror aficionado who thinks you've seen it all or a newbie looking to dip your toe into scary waters, this is your comprehensive guide to cinematic terror.
We asked BuzzFeed staff and members of the BuzzFeed Community (along with the horror buffs over at Reddit) to share the horror movies that scared them so badly they couldn't sleep. This is a really long list, so there's almost no chance you've seen them all. Keep scrolling to start losing sleep, and don't say we didn't warn you.
Note: Some submissions have been edited for length and/or clarity.
1. Final Prayer (2013)
2. The Skin I Live In (2011)
3. The Omen (1976)
4. Abigail (2024)
5. Smile (2022)
6. Longlegs (2024)
7. Inland Empire (2006)
8. Backcountry (2016)
9. Autopsy of Jane Doe (2016)
10. When Evil Lurks (2023)
11. Alien (1979)
12. Lights Out (2016)
13. Pet Sematary (1989)
14. The Last House on the Left (2009)
15. What Lies Beneath (2000)
16. A Serbian Film (2010)
17. The Visit (2015)
18. The Canal (2014)
19. Mirrors (2008)
20. Boogeyman (2005)
21. Ghost Ship (2002)
22. The Exorcism of Emily Rose (2005)
23. The Babadook (2014)
24. Apostle (2018)
25. The Witch (2015)
26. Deadgirl (2008)
27. Scream (1996)
28. Annabelle (2014)
29. Mother! (2017)
30. Thirteen Ghosts (2001)
31. Hereditary (2018)
32. The Sixth Sense (1999)
33. Jeepers Creepers (2001)
34. As Above, So Below (2014)
35. Jacob's Ladder (1990)
36. The Grudge (2004)
37. The Strangers (2008)
38. Us (2019)
39. Martyrs (2008)
40. Midsommar (2019)
41. Hell House LLC (2015)
42. Paranormal Activity (2009)
43. Puppet Master (1989)
44. The Orphanage (2007)
45. Don’t Be Afraid of the Dark (2010)
46. Baskin (2015)
47. The Human Centipede (2009)
48. Creep (2014)
49. Atrocious (2010)
50. Eden Lake (2008)
51. México Bárbaro (2014)
52. The Woman in Black (2012)
53. The Fourth Kind (2009)
54. The Conjuring (2013)
55. Terrifier (2016)
56. Piranha (2010)
57. Holidays (2016)
58. Burnt Offerings (1976)
59. Funny Games (1997)
60. The Poughkeepsie Tapes (2007)
61. Cabin Fever (2016)
62. The Evil Dead (1981)
63. House of 1000 Corpses (2003)
64. Audition (1999)
65. Cube (1997)
66. Sinister (2012)
67. The Texas Chain Saw Massacre (1974)
68. The Void (2016)
69. The Ring (2002)
70. The Human Centipede 2: Full Sequence (2011)
71. Antichrist (2009)
72. 1408 (2007)
73. Shutter (2004)
74. Suspiria (1977)
75. Hellraiser (1987)
76. Raw (2016)
77. Rec (2007)
78. It (1990)
79. The Hills Have Eyes (1977)
80. Bloody Reunion (2006)
81. Silent Hill: Revelation (2012)
82. Dark Water (2002)
83. Teeth (2007)
84. Strange Circus (2005)
85. The Blair Witch Project (1999)
86. The Possession of Michael King (2014)
87. Jeruzalem (2015)
88. A Quiet Place (2018)
89. Fire in the Sky (1993)
90. Candyman (1992)
91. The Perfection (2018)
92. A Nightmare on Elm Street (1984)
93. Grave Encounters (2011)
94. Event Horizon (1997)
95. Darkness Falls (2003)
96. White Noise (2005)
97. Jacob's Ladder (1990)
98. The Exorcist (1973)
99. Begotten (1990)
100. Creepshow 2 (1987)
101. Phantasm (1979)
102. The Cell (2000)
This article contains content from Allie Hayes,Anna Kopsky, Kelly Martinez, andAngela Andaloro. It was compiled by Kelly Rissman.