

Practical Effects
Geddes' creature work punches way above budget
Acting
McHattie's gravel-voiced gravitas sells absolute nonsense
Cinematography
Sickly greens and void blacks create genuine unease
Director
John Geddes
Trivia, insights & behind the scenes
Director John Geddes and star Stephen McHattie previously collaborated on Exit Humanity, establishing their Canadian horror bromance.
Released in the wave of 'mumblegore' indie horror, Hellmouth rejects found footage for deliberate, almost Tarkovsky-adjacent pacing—then ruins it with demon puppets.