Yosano Studios

18/06/2026

Less than two days left of the Medieval Nights Kickstarter... fully funded... next stretch goal just a couple of backers away... and 10 (11, now) medieval adventures are getting ready for art and layout :-)

Ten medieval-fantasy RPG adventures, based on real medieval chronicles and writings. With stats for Ars Magica, DnD 5e, and Mythras.

12/06/2026

I've created a basic floor plan for a monastery, with a six page PDF explaining how medieval monasteries worked (what each room is for, how daily life works in a community like this, what the daily schedule is, what the main roles are in a monastery).

Hopefully this is useful for people running or playing in games in medieval-fantasy or historical-medieval worlds. The map can be used as a "battle map", or the whole thing can be used as background and setting. And as there's no adventure or plot here, so it works just as well as background for players as it does as context for GMs/DMs/SGs.

I've uploaded this here: https://www.patreon.com/Yosano/posts/medieval-floor-160793620 (Yes, that's a Patreon link. No, you don't need to sign up - it's a public / free download.)

- K

21/05/2026

Medieval Nights is now live on Kickstarter! This is an anthology of ten punchy adventures based on real medieval stories - poems, legends, and "true stories"... lots of true stories. Like the true story about the demon slitting new-born babies' throats, and the true story about the green children, and the true story of the disease-spreading walking dead... so stuff that medieval people thought was "true", not what actually was.

So if you want some cool medieval stories to inspire your players (Ars Magica, Mythras, DnD).... here are ten for you. Or more, depending on the Stretch Goals.

Ten medieval-fantasy RPG adventures, based on real medieval chronicles and writings. With stats for Ars Magica, DnD 5e, and Mythras.

23/04/2026

With Medieval Nights now about 85% written, I'm going to do a few videos explaining how we turn historical medieval stories into RPG adventures that retain that medieval edge while working for RPG groups.

First one is here - William of Malmesbury's Witch of Berkeley

The Witch of Berkeley as an RPG Adventure

31/03/2026

Free League have announced a new Third Party License for Coriolis: The Third Horizon - which is generally awesome. Looking forward to seeing what people do with this!

For us, we had said that as soon as the license came out we'd launch The Blood Tree on Kickstarter ... but... err... I kinda hope that people will forgive us if we wait until we've fulfilled The Serpent! Running two sci-fi Kickstarters back to back seems a little crazy.

So, delighted to have the license now, but The Blood Tree will have to wait just two or three months!

Adventures and Campaigns in the City of The Conglomerate, for Coriolis: The Third Horizon

11/03/2026

Campaign Diary covering how different groups dealt with the first Act of House of the Crescent Sun: https://www.youtube.com//playlists It's a long watch/listen (all three parts together total nearly two hours), but should give a sense of how players can turn a sandbox-y campaign into something uniquely their own... and that just in the first Act!

Resources, GM/DM/Storyguide advice and general musings for sci-fi and medieval-fantasy tabletop RPG adventures and settings. Ars Magica, Coriolis, DnD 5e, Mythras, and Traveller.

09/03/2026

Had a lot of fun chatting to the folks at the Effekt Podcast https://www.effektpodcast.org/278 - about Coriolis and RPGs in general....

We talk about interview prolific author of Third Horizon adventures Kevin Hassall00.00.40: Introductions00.02.22: Welcome to our new patron: Peter Taylor00.03.53: World of Gaming: Temeraire RPG f...

05/03/2026

Cool review for House of the Crescent Sun https://www.youtube.com/watch?v=Hxaw56RPCQ8 from Studio Cursus. Actually very funny - and hey, delighted by all the positive remarks!

Get The House of the Crescent Sun on Drivethru RPG: https://www.drivethrurpg.com/en/product/551117/the-house-of-the-crescent-sun-campaign-book?src=hottest_fi...

27/02/2026

Humbled and honoured to be writing in collaboration with such famous co-authors as Marie de France, Burchard of Worms, Walter Map and Giovanni Boccaccio. Not that they have any say in the matter. Being dead. :-p

Ten medieval-fantasy RPG adventures, based on real medieval chronicles and writings. With stats for DnD 5e and ars magica.

26/02/2026

And... The Serpent is now live on Kickstarter! So if you want some classic sci-fi with an evocative, Persian flavour, back it here!

A campaign of political intrigue and ancient secrets, inspired by classic Persian literature.