A curated list, not an algorithm
The picker draws from a hand-maintained list of horror films, from silent-era classics to recent releases. Release years, running times and directors were checked against Wikidata; the sub-genres, moods and intensity guide are our editorial tags, meant to help you choose rather than to grade the films.
Intensity runs from 1 (atmospheric and suitable for the easily rattled) to 5 (graphic or relentless). Running times are the commonly listed theatrical versions; director's cuts and streaming versions can differ by a few minutes.
The picker does not check where a film is streaming; availability changes too often and varies by country.