 Migos, John L. Cherevka |  Migou city, Zach Graves |  Migou cult, Zach Graves |  Minions of Cthulhu, autor desconocido |  The Mirror of Nitocris, Dev/Zero |
 Miskatonic campus, Brandon Kruse |  Miskatonic University, Shane Nitzsche |  Miskatonic University Antarctic Expedition, Alexey Lipatov |  Miss Arkham 1867, A. Gokhan Gultekin |  Miss Innsmouth, Larkin |
 Miss Innsmouth 1974, Chris Bourassa |  Mistletoe, Daryl Toh Liem Zhan |  Los Mitos de Cthulhu, Eduardo García Calderín |  Mnemovore, Mike Huddleston |  Modern Cthulhu, Erik Yotsubaceo |
 Mollusc Tree, Keith Thompson |  Les Mondes de Lovecraft, Olivier Peru |  Les Mondes de Lovecraft - Couverture, Olivier Peru |  The Monster Mash, Gustavo Díaz Montáñez |  Monster Nighgaunt, James Daly III |
 Moon Beasts, Sebastian Blanché |  Moon Beasts, Jeff Remmer |  Moon-beast, Doug Snook |  The Moon-Bog, Bea Holmes |  The Moon-bog, Abigail Larson |