| Mage to Order | Drowning Moon Studios | pdf | |
| Magical Bears in the Context of Contemporary Political Theory | Jenna Katerin Moran | epubpdf | |
| Magitecnica - The Use and Misuse of Powers Great and Small | WTF Studio | jpgpdfpng | |
| Magus-Corebook | | pdf | |
| Magus-ThroughTheLookingGlass | | pdf | |
| Main Book | | pdf | |
| Main Book (PF) | | pdf | |
| Main Book Plain Text | | pdf | |
| Making History: Three One-Session RPGs | Molten Sulfur Press | pdf | |
| Mana Meltdown | Lazy_Litches_Loot | pdf | |
| Map of Orn | | png | |
| Map of Titan Port digital | | jpg | |
| MappaImperium | | pdf | |
| Marks: A Game for Fools | Anthocene Press | pdf | |
| MCMLXXV (1975) | Frog God Games | pdf | |
| Medieval Civilization Generator | Currentpattern | pdf | |
| Mendicant Spell Vixens | Richard Kelly | pdf | |
| Midlands Low Magic Sandbox Setting | Pickpocket Press | pdf | |
| Misty Isles of the Eld | Hydra Cooperative | pdf | |
| MM Singles v1.6 | | pdf | |
| MM Spreads v1.6 | | pdf | |
| MMZine v1.6 | | pdf | |
| Modest Medusa Season 1 | Atarashi Games | pdf | |
| Modest Medusa Season 2 | Atarashi Games | pdf | |
| Modest Medusa Season 3 | Atarashi Games | pdf | |
| Modiphia - Issue #1 | Modiphius | pdf | |
| Modiphia - Issue #2 | Modiphius | pdf | |
| Modiphia - Issue #3 Spring 2018 | Modiphius | pdf | |
| Modiphia - Issue #4 Winter 2020 | Modiphius | pdf | |
| Modiphia - Issue #5 Spring 2021 | Modiphius | pdf | |
| Monolith | Adam Hensley | pdf | |
| Monster Pack 1 - Epic Isometric | WarDrumRPG | zip | |
| Monster Pack 2 - Epic Isometric | WarDrumRPG | zip | |
| Mortzengersturm, The Mad Manticore of the Prismatic Peak | Hydra Cooperative | pdf | |
| mp3 | | mp3 | |
| MurkyTime | Murkdice | pdf | |
| Mystery Framework | | pdf | |
| Mystery Framework Basic Markdown | | md | |
| Mythic Rome Maps | Design Mechanism | pdf | |
| Mythic Venice | Games From Folktales | pdf | |
| The Mage's Grave | Annulus Publishing | epubmobipdf | |
| The Making of Between Clouds | Andi Licht | pdf | |
| The Memorialists - Dead City Memories, Vol. 1 | WTF Studio | pdf | |
| The Metamorphica (Classic Edition) | Chthonstone Games | zip | |