Kostadis Roussos

We are creating Munchkin 5.5e, a 5th-edition-compatible RPG, and a whole product line.

The spiritual successor of Dark Sun®, for 5.5E. Written by the co-creator of Dark Sun®. The Dragon Kings are gone, and the rains went with them. What remains of Khitus is sand, ruin, and the stubborn few who still believe it can be saved.

Unshackle player creativity with near-limitless character options in this new core RPG, which redefines and brings a balanced, point-based framework to the Fifth Edition foundation.

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!

The most innovative software suite for gamemasters is back with two more RPG apps focused on interacting with your players and managing your table's atmosphere.

Spawns of the Mindrender is a massive, 600-page D&D 2014 and 2024 5e-compatible dark fantasy adventure and campaign setting for levels 11-15 with extensive player options.

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

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

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

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.

This crunchy 5E sourcebook elevates your adventure to new heights with flying mounts for all characters and their adversaries! Variant cover by 2014-era legend Hydro74 is hobby trade exclusive! Plus exclusive play mat, pogs and pawns for tabletop play!

ENDING SOON! The wondrous science-fantasy RPG Numenera returns in a new edition filled with new art, creatures, lore, numenera items, and adventures. Step into the amazing Ninth World—a critically acclaimed, fan-loved RPG setting like no other!

Three Books of Legendary Dragons, Lairs, and Dragon-Forged Relics for 5e.

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!

"We watched Cthrion Uroniziir try to reduce the timescape into one singular universe, wiping out reality as we know it. She was defeated, and we see her cage every day."

The successor to AEG's award-winning RPG book "Toolbox" and platinum best seller "Ultimate Toolbox" - the World's Largest take on the Ultimate Toolbox is Over 400 pages of the best charts, tables, and seeds of gaming adventure.

From the birth of roleplaying to the discovery of the Forgotten Realms, from the rise of Basic D&D to the fall of Mystara, historian Shannon Appelcline brings you the story of OD&D, Basic D&D, and AD&D 1e in Designers & Dragons: Origins.

From freezing tundras to lush jungles, this supplement features 100 NPCs who live in the wilds. These stat blocks cover everyone you would meet in the wilds, like survivalists, cultists, explorers, guides, new species, and so many more!

Get a complete guide to how villains think, work, and act. Masterminds of Crime is packed with new mechanics, items, feats, NPCs, and more...

Drop-in Villages and Town Descriptions for Any Fantasy TTRPG

The Witches' Path is a 5e-compatible expansion set in the grimdark world of Nightfell. This new sourcebook explores the theme of witchcraft as it has never been portrayed before in a setting shrouded in darkness.

The World's Largest Dungeon is a 1,600+ page, four-book behemoth megadungeon. Experience the Guinness World Record-winning dungeon crawl like never before - fully updated to 5E of the Worlds Most Popular Roleplaying Game!

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 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!