The list was updated monthly and concluded on February 10th, 2022. It was ranked by average Letterboxd member rating.
• Feature-length narrative films included only.
• Shorts, documentaries, and TV are excluded.
• Films must have their first national release in any country in 2021. Festival premieres only are excluded.
• Films must have the horror genre tag on TMDb and Letterboxd.
• There is a 1,000 minimum view threshold.