ZERO/Barrier is a publishing and media marketing company based out of Ottawa, Ontario, Canada. We produce the free RPG zine “Dyson’s Dodecahedron” as well as other books for old school RPGs.
- Dyson’s Delves – critically-acclaimed book of maps and adventures
- Magical Theorems & Dark Pacts – a book of OSR spellcasting options
- Dyson’s Dodecahedron – an irregularly-published 12-page zine for the Labyrinth Lord RPG – 7 issues have been released to date.