 Menace from the Moon (Ene 2007) |  Mentiras eternas (Oct 2017) |  Meurtre à Dunwich (1984) |  Midnight Harvest (2008) |  Minions (1997) |
 La mirada hueca (May 2023) |  Miskatonic University (2005) |  Miskatonic University (1995) |  Miskatonic University Antarctic Expedition Pack (1999) |  Miskatonic University Graduate Kit (1987) |
 Missed Dues & Blackwater Creek (2014) |  El misterio de las Cajas Bandargi (May 2016) |  Los Mitos de Cthulhu de Sandy Petersen (Oct 2020) |  More Adventures in Arkham Country (2010) |  Mortal Coils (1998) |
 Mortal Coils: Espiral Mortal (2000) |  Muerte en el expreso (2021) |  Multiverse #3 - Australian role playing game magazine (1984) |  Murder of Crows (2008) |  The Murderer of Thomas Fell (2008) |
 Music From a Darkened Room (2017) |  Mutable Deceptions, Vol 1: Jazz Age Newspapers (2013) |  Mysteries of Hungary (2007) |  Mysteries of Ireland (2012) |  Mysteries of Mesoamerica (2009) |