The Ruins of Castle Gygar

The Ruins of Castle Gygar is a 360+ room megadungeon designed for old school tabletop RPGs. It is designed with Old-School Essentials in mind but will play great with any OSR B/X compatible game, your favourite retroclone, five-ee, or fantasy heartbreaker. 

The Ruins of Castle Gygar began as a #Dungeon23 project that I completed over the length of 2023. The #Dungeon23 project was an initiative to write one dungeon room a day every day for 2023, and I completed it! I then spent the next six months digitizing my notebook, refining it into a useable, runnable megadungeon. 

Castle Gygar is inspired by many things, such as the original Greyhawk dungeon by Gary Gygax, the structure of the megadungeon in Nethack, as well as the maze structure dungeons of the classic Wizardry computer games. 

The book is written by Onslaught Six and features art by Chaoclypse and was edited by Ennie award winner Roz Leahy. 

Thank you so much for your support. We wouldn’t be able to keep making TTRPG stuff without you. We sincerely thank each and every one of you who’s ever donated to our Kickstarters, or bought our books. Your support is vital to us continuing to make dope shit.