Out of curiosity (or rather my own amusement), I tried my hand at fleshing out interactions between a PC running a dominion, rival nobles, a...

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There isn’t an explicit set of mechanics handling pain and exhaustion for PCs, but there are decent mechanics for Morale that could be usefu...

Immunity to non-magical attacks is an old D&D BECMI rule designed to make high-level monsters tough to defeat. With equally high-level oppon...

Open Game License , 2/25/26 ©2026 Bruce A. Heard This digital supplement includes a booklet along with three labeled poster maps of the Iron Queen gunship, and two unlabeled, plus maps needed for an a...

I have the pleasure of announcing the upcoming release of my latest project: The Iron Queen . Designed for Old Style Essentials (classic ve...

This article has been more of a whopper after having had a look at French and British wartime industries (click here for France or Britain ...

Since I recently completed research on France's aviation industry ( see here ), I couldn't just walk away without doing the same for the U.K...

I've been toying with a what-if scenario about an alternative buildup strategy for the French air force in the 30s. One of the biggest probl...

French aviation of the 30s always puzzled me as regards its industrial basis and organization. I decided to look this up. Here's what I foun...

Dwarves of Kragdûr fly large, armored, steampunk-style gunboats, mostly in Calidar’s outer space. My plan is to draft a whole ship in detail...

A few words about the dwarven Fetzgrim engine. I posted a note in the Calidar chat group on Facebook on this matter. I’m picking up here wh...

A Mighty Citadel by J. Humphries on Deviantart I say D&D, although I mean specifically BECMI/RC . The mechanics on building castles are pre...

The Great Caldera is the region of the World of Calidar representing its known world. The rest of the planet is a vast wilderness under the purview of powerful natural entities, spirits bent on repell...

A game that teaches you all about natural history (not!) In reality, its a silly game that is fun, quick, and easy to play.

BBC, Tales of the Old Bailey (unknown artist) This derivative of the D&D BECMI thief class describes a specialized tomb robber and somewhat...

The Known World of Dungeons & Dragons began taking shape in the B/X edition, making D&D distinct from AD&D, which was set in the World of Greyhawk in the early 80s. My first contact wit…