When creators dream up imaginary worlds, they can go in two directions. They can build their world from a curated set of ideas, and then fit these pieces together into a logical and consistent manner. In a fantasy gaming, these creators worry about how magic affects society and culture, and then wind up with worlds like Glorantha or Tekumel.

Dave Hargrave’s campaign world of Arduin was not built; it was piled. To create Arduin, Hargrave took every fantastic element he dreamed up or fancied and piled them into one work of love. If Tekumal is a museum, with treasures for contemplation, then Arduin is a dragon’s horde, with everything shiny heaped to the walls.

Inspired by the Greyhawk and Blackmoor supplements, Hargrave printed his house rules, lore, and advice in a little, brown book named after his world, The Arduin Grimoire. In 1977, his unofficial supplement to Dungeons & Dragons debuted at California’s DunDraCon II convention. The book’s success led to the sequels Welcome to Skull Tower (1978) and The Runes of Doom (1978).

In a look back on the trilogy, Ryk Spoor called Arduin “one of the most absolutely concentrated essences of the fun of roleplaying games ever made.” Jonathan Tweet, the lead designer of third-edition D&D, called Arduin the “the coolest RPG book ever.”

Sometime in 1979, I found the series on the shelves of The Hobby Chest in Skokie, Illinois. The pages teemed with fresh ideas. The author suggested strange pairings of science and fantasy. He tore up the D&D rules and offered wild changes. It all seemed a little subversive. I became enchanted. I haven’t found a game book that proved as enjoyable to read. At first I thumbed through the books at random, discovering gems, then I turned to page one and read. (Due to the books’ random organization, both reading orders felt the same.) As Hargrave wandered through Arduin lore and free-associated roleplaying game wisdom, I learned three lessons.

Fantasy gives freedom to imagination.

As D&D’s audience exploded, in the days before Appendix N, most new players’ experience with fantasy started with Tolkien and ended with a few imitators. The sort of science-fantasy found in say, Jack Vance, seemed wrong. To us, Hargrave preached bigger imaginary playgrounds. “The very essence of fantasy gaming is its total lack of limitation on the scope of play, both in its content and in its appeal to people of all ages, races, occupations or whatever,” Hargrave wrote. “So don’t limit the game by excluding aliens or any other type of character or monster. If they don’t fit what you feel is what the game is all about, don’t just say ‘NO!,’ whittle on them a bit until they do fit.” (Vol. II, p.99)

Evidence of his creative abandon appears everywhere, from the “Multiversal Trading Company” to descriptions of the world’s 21 hells. For instance, the 17th plane of hell features blasted futuristic cities and space ports under a blue-black, moonless sky. Most vegetation is petrified. This hell’s most common inhabitant is The Black Wind, a fog of shifting shadows, lit by crackling, blue lighting bolts. The wind envelops and attacks psychically, taking over the body, and “forever making it alien.”

Hargrave welcomes a variety of character types. “Do not be a small player in a small world, embrace the whole Alternity and give different types a chance. I think you will find that the world your game is in will become a lot more fun if you do.” (Twenty years later, Dave Hargrave’s portmanteau “Alternity,” from alternate eternities, would become the name of a Wizards of the Coast RPG.)

Gary Gygax favored D&D parties where humans outnumbered the elves, dwarves, and other non-humans. Such groups matched the mostly human characters in the fantasy tales that inspired D&D.

Today’s D&D groups resemble the Star Wars cantina scene, where exotic species outnumber the odd human. Hargave encouraged similar, strange mixes. An advertisement for Arduin shows an adventuring party consisting of 4 unlikely companions:

• a phraint, emotionless humanoid insects
• a deodanth, undead elves from eons in the future, now lost in their past
• a saurig, dinosaur-men from the distant past bred as killing machines
• a masked, human samurai somehow somehow fighting alongside these gonzo creatures

Even now, this assembly seems stranger than the typical Adventurers League mix of, say, a tiefling, a tortle, someone with fire for hair, and a goblin named Percy.

The rules belong to players.

Jonathan Tweet noted the weakness of the Hargrave’s rules. “The Arduin system is usually unbalanced and often unbelievably complicated.” Still, some mechanics would fit a modern game. For example, he offers rules for touch attacks and a hit point system that resembles fourth edition’s. But the specific rules hardly mattered. Hargrave encourages players to own the rules and their games, to tinker, to playtest. On presenting his magic system, Hargrave advises readers to “take whatever I have that you like, use the old established fantasy gaming systems…and put together whatever you like in a magic system. Who knows, it may end up with such a good system that people will want to publish your fantasy world.” (Vol. I, p.30)

Detail makes game worlds come to life.

In an era when state-of-the-art setting design consisted of the Wilderness Survival map and some encounter tables, Hargrave opened a world with detail that rivaled any setting that came later. According to Ryk Spoor, “One of the strongest and most powerfully attractive parts of the Arduin series was that, within and around the game mechanics, the statistics for demons and items and spells, Dave Hargrave wove tales and hints of his campaign world, giving us a look at the life of a world that didn’t exist, but…perhaps… could, elsewhere.”

Arduin Now and Then

To gamers today, Arduin’s three lessons may seem obvious. New games seek freshness by colliding genres, so cowboys meet the undead, magic meets cyberpunk, and so on. Endless setting books lend detail to world building. When the fifth-edition designers explain their hesitancy to tweak the published rules, they say the rules belong to the players now. Arduin’s phraints seem to have become Dark Sun’s Thri-Kreen.

True, but in 1978, Arduin’s lessons demolished barriers that would never stand again.

Gary Gygax versus The Arduin Grimoire

In the 70s, Gary Gygax resented products that rode his and D&D’s coattails. The man had 6 children to feed! Arduin aped the little, brown books and tore down D&D’s rules, so the grimoires earned particular ire. In the Dungeon Master’s Guide (1979), Gary added the Vacuous Grimoire (p.155) as a dig at The Arduin Grimoire. Read it and lose 1 intelligence and 2 wisdom. In the pages of The Dragon, Gary attacked spell points, critical hits, and other rules that Hargrave offered as improvements.

TSR issued a cease and desist letter to Hargrave, who responded by blanking references to D&D. My printing splices in mentions of “other popular systems” and “old established fantasy gaming systems” where D&D was mentioned. Hargrave took to calling Arduin a completely different game, although it skipped essential rules that readers must find elsewhere (in D&D). Rules sections are labeled as changes or revisions to an unnamed game (still D&D).

Over the years, Hargrave created the missing rules needed to make a stand-alone game. But no one cared about his rules. Dave Hargrave never realized that his rules hardly mattered.

His feverish invention mattered. Arduin’s lessons mattered—and they changed role-playing.

Emperors Choice Games offers Arduin products for sale. The original trilogy now appears in a single volume.