Eric Mayes

The Glitter Boy Codex is coming soon! This is the first Rifts sourcebook dedicated to the most recognizable power armor in the Megaverse. Written by Will Erwin, with additional text by Johnny Roccia, and Sean Owen Roberson as Lead Designer.

The brand-new Cypher is the fast, flexible, and easy-to-GM RPG for any campaign you want to run. Let's take it to even more new places with cool options to customize your game and really make it soar in this short FLASH campaign!

An ENNIE Award-winning city setting packed with books, maps, handouts, and immersive tools—everything you need to run unforgettable urban adventures in Darkenhaven.

Forged in blood by Professor DM and Roll For Combat, with contributions from Brandon Gillam, this is not another safe fantasy game. This is steel. Fire. Consequence.

Outgunned Adventure is back with 3 challenging campaigns.

The Black Spire Pact is a slipcased pair of PvP adventure books where one player is a mortal sorcerer, the other a demon lord. PvP Gamebooks use a streamlined system built on and fully compatible with Old-School Essentials.

An Interdimensional Hell-Market for Old-School Essentials. Life is cheap here...but a good soul will cost you.

The oldest and most influential sci-fi TTRPG of all time meets the world’s most popular roleplaying game, with a complete 5e conversion by World’s Largest RPGs.

A series of connected adventures starting in our mortal realm and descending into Hell itself.

An official OSE supplement of demons, cults, and dark magic.

Legendary TTRPG designer Monte Cook, creator of Return to the Temple of Elemental Evil, Ptolus, and more, returns to the megadungeon!

The forge of fantasy role playing, Gary Gygax's legendary dungeon and its environs. Here begins the journey into depths never before reached.

A massive megadungeon boxed set with 30 levels and a year of real-time adventure! DCC or 5E, regular or clamshell edition. Plus gemstone DCC dice!

Hunt, climb and slay colossal Titans in TITANBOUND, designed for use with Shadowdark RPG. New kaiju-slaying classes, magic, gear and ancestries will help you bring down the biggest monsters ever imagined!

Druskara is a brutal sandbox setting made for use with Shadowdark where the world evolves with or without you and your choices reshape the realm.

Enspell your table! Rebuilt from the ground up, fully OGL-free, brand new content, refined for clarity and usage. Over 1,000 spells, 210 rune spells and much more. This expanded tome brings the power of arcane, divine, and runic magic into your hands!

After 25 years of kicking down doors and battling monsters, a Second Edition of Munchkin is here with updated art and design . . . and gold!

New old-school adventures for fans of 5E and DCC! Pinball Crawl Classics adapts classic pinball cabinets to DCC RPG rules - while Old-School Adventures #1 brings gruesome foes, dark mysteries, and magic to startle and amaze to your 5E game!

The award-winning TTRPG perfect for forging the stories YOU want to play. Lightning-quick character generation. Super easy to GM. Unique and imaginative campaigns. And all the flexibility, story focus, and fast-paced play Cypher is famous for!

ENNIE Award Nominated RPG (Best Rules, Product of the Year 2025) Memento Mori is back with the limited Deathless Edition, and a brand new Campaign: The Old City

Rifts Promise of Power Reforged — discover the lost Rifts video game and play it on the PC with updated graphics & gameplay. Join our crowdfunding campaign to bring this iconic Rifts tactical computer RPG to a new generation!

Take what you need! New equipment! Ready made backpacks! 14 new classes Reforged, mutliclassing, war dogs, and pack ponies. Unarmed combat, spell turning and more. Join us for this massive expansion and remember, take only what you need!

The City State of the Invincible Overlord is an epic collection of campaign resources for both 5e and DCC RPG. More than 800 pages of material, multiple poster maps, and a city’s worth of gaming!

The 2006 retro-clone of first edition AD&D, rewritten and reorganized for 2025! OSRIC 3 is easier to learn, with more examples of play. This is the beginning of a new product line for Mythmere Games, to include adventure modules and much more!