| 2026 | Juvenile Inspektor: The Shadow Over Jõhvi | Writer |
| 2025 | The Shadow Out of Time | |
| 2024 | H.P. Lovecraft's the Shadow Over Innsmouth | |
| 2024 | Dreams in the Witch-House | |
| 2024 | H. P. Lovecraft's the Old Ones | |
| 2024 | Unspeakable: Beyond the Wall of Sleep | |
| 2024 | Dunwich Journals | |
| 2023 | The Innsmouth School for Girls | |
| 2022 | When the Earth Gives Up the Dead | |
| 2021 | At the Mountains of Madness | |
| 2021 | Haunters of the dark | |
| 2020 | The Haunter of the Dark III | |
| 2020 | Tales from the Grave: The Movie | |
| 2020 | Chaos from the Old World. Part II | |
| 2020 | The Deep Ones | |
| 2020 | Castle Freak | |
| 2019 | Color Out of Space | |
| 2018 | Blasted Heath | |
| 2017 | Herbert West: Re-Animator | |
| 2017 | The Haunter of the Dark II | |
| 2017 | Pyos | |
| 2017 | Lake Vostok: At the Mountains of Madness | |
| 2016 | Howard Lovecraft and the Frozen Kingdom | |
| 2016 | From Beyond | |
| 2016 | Dead Tongues | |
| 2015 | The Last Case of August T. Harrison | |
| 2015 | The Haunter of the Dark | |
| 2014 | Call Girl of Cthulhu | |
| 2013 | Banshee Chapter | |
| 2011 | The Whisperer in Darkness | |
| 2010 | The Valdemar Legacy | |
| 2010 | The Color Out of Space | |
| 2010 | The Valdemar Legacy II: The Forbidden Shadow | |
| 2010 | Three Shadows | |
| 2010 | Pickman's Muse | |
| 2008 | Colour from the Dark | |
| 2008 | Beyond the Dunwich Horror | |
| 2007 | H. P. Lovecraft's the Dunwich Horror and Other Stories | |
| 2007 | The Whisperer in Darkness | |
| 2007 | Kammaren | |
| 2007 | Cthulhu | |
| 2006 | Beyond the Wall of Sleep | |
| 2006 | The Horror of H.P. Lovecraft | |
| 2006 | The Rats in the Walls | |
| 2005 | Strange Aeons: The Thing on the Doorstep | |
| 2005 | The Call of Cthulhu | |
| 2004 | The Halfway House | |
| 2003 | The Thing on the Doorstep | |
| 2003 | Beyond Re-Animator | |
| 2003 | The Dream-Quest of Unknown Kadath | |
| 2002 | The Music of Erica Zann | |
| 2001 | Dagon | |
| 2000 | Cthulhu | |
| 2000 | Chilean Gothic | |
| 1997 | Bleeders | |
| 1993 | Necronomicon: Book of Dead | |
| 1992 | The Unnamable II: The Statement of Randolph Carter | |
| 1992 | Cthulhu Mansion | |
| 1991 | The Resurrected | |
| 1990 | Bride of Re-Animator | |
| 1989 | Dark Heritage | |
| 1988 | Pulse Pounders | |
| 1988 | The Unnamable | |
| 1987 | The Testimony of Randolph Carter | |
| 1987 | The Curse | |
| 1986 | From Beyond | |
| 1985 | Re-Animator | |
| 1981 | The House by the Cemetery | |
| 1981 | The Beyond | |
| 1980 | City of the Living Dead | |
| 1979 | The Island of the Fishmen | |
| 1975 | Night of the Seagulls | |
| 1970 | The Dunwich Horror | |
| 1967 | The Shuttered Room | |
| 1965 | Die, Monster, Die! | |
| 1965 | City in the Sea | |
| 1963 | The Haunted Palace | |