Lord Erbian's Stellar Bestiary, by Sam Inabinet
Madness in Freeport : a D20 System Adventure, by Simoni, William
Make Your Own Luck (13th Age), by Gareth Ryder-Hanrahan
Manual of the Planes (Dungeon & Dragons d20 3.0 Fantasy Roleplaying), by David Noonan, Bruce R. Cordell, Jeff Grubb
Map Folio 3-D (Dungeon & Dragons Accessories), by Wizards Team
Marauders of the Wolf: The Dwarves (Sovereign Stone: D20 System), by Lichucki, Michael, Ward, James
Mastermind (Spycraft D20 Spy Game), by Crow, Steve, Flagg, Alexander, Flory, B. D., Oliver, Clayton A.
Maze of Zayene Tower Chaos (d20 Generic System), by
Midnight RPG Legends Of Shadow, by Fantasy Flight Games
Midnight, Second Edition, by Fantasy Flight
Midnight: Heart of Shadow, by Iain J. brogan, Eric Olson
Midnight: Sorcery & Shadow, by Fantasy Flight Games
Monster Compendium: Monsters of Faerun (Dungeon & Dragons d20 3.5 Fantasy Roleplaying), by Heinsoo, Rob, Wyatt, James
Monster Manual II (Dungeons & Dragons d20 3.0 Fantasy Roleplaying Supplement), by Bonny, Edward, Winter, Steve, Redman, Rich, Grubb, Jeff
Monster Manual III (Dungeons & Dragons d20 3.5 Fantasy Roleplaying Supplement) (No. 3), by Wizards Of The Coast
Monster's Handbook: A Sourcebook for Creating and Customizing d20 System Monsters (Legends & Lairs, d20 System), by Fantasy Flight Games
Monsternomicon (Privateer Press d20), by Pendrake, Viktor
Monsters of Faerun Dungeons Dragons d20, by James Wyatt, Rob Heinsoo
Most Wanted (Spycraft), by Alex Flagg, Mark Christianson
Munchkin Player's Handbook (D20 Generic System), by Steve Jackson, Andrew Hackard
Mythic Vistas: Skull & Bones, by
Necropolis (Sword & Sorcery), by Gygax, Gary
Pathfinder Adventure Path: The Serpent's Skull Part 1 - Souls for the Smuggler's Shiv (Pathfinde Adventure Path), by Jacobs, James
Pathfinder Roleplaying Game: Core Rulebook, by Bulmahn, Jason
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