Hydra Cooperative Catalog

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Click the title or cover image of the items in the catalog below to purchase your brand new RPG treasure from our storefronts at DriveThruRPG and RPGNow.

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Hill Cantons
A Slavic-myth inspired, acid fantasy world of Moorcockian extradimensional incursions and Vancian swindlers and petty bureaucrats. For Labyrinth Lord and other well-aged fantasy games.
Slumbering Ursine Dunes
Run, play or splice up 66 pages of mayhem and weirdness in this Slavic mythic-inspired (with an acid fantasy-twist) mini-sandbox for Labyrinth Lord or well-aged fantasy rpg! Not just an adventure of mini-setting, Slumbering Ursine Dunes offers a 25-point hexcrawl, 2 dungeons, & unique spells, monsters, and factions from a weird corner of the Hill Cantons setting.
Fever-Dreaming Marlinko
Visit Marlinko, a borderlands city where life takes a strange fever-dream cast, in this 72-page urban adventure fantasy supplement. Part city-setting, part full-blown adventure, Fever-Dreaming Marlinko is a stand-alone companion to the Slavic acid fantasy weirdness of the Slumbering Ursine Dunes.
Misty Isles Of The Eld
Come visit the acid fantasy mini-sandbox of the Misty Isles, a hellish pocket plane that’s brutally displaced a bucolic paradise. Marvel at its massive grub-ridges, shake at the body horror of its protein vats–and watch as your players dynamically unleash the Anti-Chaos Index through their own in-game actions. Misty Isles of the Eld is a stand-alone sequel to Slumbering Ursine Dunes and Fever-Dreaming Marlinko.
Hill Cantons Cosmology
The gods and cosmic weirdness of the Hill Cantons come alive(ish) in this primer that packs a whole lot of flavor into eight pages.
Hill Cantons Compendium II
Being a Collection of Player Options and House Rules Various and Sundry for Classic Fantasy Role-playing Games Old and Dear. You’ll find an introduction to the Hill Cantons setting, nine variant character classes, and more!
Marlinko Map Pack
Three drop-dead gorgeous isometric city and dungeon maps offered as a separate download for ease of use with Fever-Dreaming Marlinko
Strange Stars
STRANGE STARS is a setting for any game where modern transhuman science fiction meets classic 70s space opera. It’s the far future, Old Earth is lost and shrouded in legend, and the children of paleo-humanity have long ago populated the stars, branching into new forms and strange cultures. Adventure is measured in light-years!
Strange Stars
A setting for any game where modern transhuman science fiction meets classic 70s space opera. It’s the far future, Old Earth is lost and shrouded in legend, and the children of paleo-humanity have long ago populated the stars, branching into new forms and strange cultures. Adventure is measured in light-years!
Strange Stars FATE Rule Book
It’s the far future, Old Earth is lost and shrouded in legend, and the children of paleo-humanity have long ago populated the stars, branching into new forms and strange cultures. Adventure is measured in light-years!
Weird Adventures
Only the most hard-boiled adventurers make it in the City. You think you’ve got what it takes? Grab your gun or grimoire and find out. Weird Adventures is a setting where traditional rpg fantasy meets the Pulp era.
Weird Adventures
Welcome to the City, where the streets are mean—and what lurks beneath them is even meaner. Only the most hard-boiled adventurers make it in this town. You think you got what it takes? Grab your gun or grimoire and find out. Weird Adventures is a setting where traditional rpg fantasy meets the Pulp era.
Strange Trails
Want to sample the pulp fantasy setting Weird Adventures before you buy? Strange Trails has eight articles on the world of Weird Adventures from the From the Sorcerer’s Skull blog, expanded, annotated, and illustrated—plus an “Appendix N” that offers an extensive look at the City and its weird world.
Ruins & Ronin
Swords & Wizardry chanbara-style! Samurai, shugenja, and ninja against petty warlords and bizarre Oni.
Ruins & Ronin
A complete set of rules for playing an old school fantasy game (Swords & Wizardry compatible) in a Medieval Japan-like setting. Contains new classes and races, new weapons, and an extensive bestiary.
Wargames
Abstract medieval fantasy war games designed to be used with or without miniatures, fully compatible with the Hill Cantons and Labyrinth Lord.
By This Axe
Mercifully short 12-page set of rules for running Medieval and Fantasy battles with miniatures.
By This Poleaxe
A four-page set of rules to allow a GM to run small-scale battles or skirmishes involving 15-120 combatants on each side without miniatures for use with well-aged fantasy games. Can also be used in conjunction with By this Axe
Juvenilia
Hilariously embarrassing archeological discoveries from Chris’s misspent youth. Puts the ‘juvenile’ back in juvenilia.
Tree Maze Of The Twisted Druid
Straight from the garage of Chris’s mom–and 1981–comes this homegrown, truly old school adventure of malign druids, twisted tree demons, evil blink dogs, arboreal gelatinous cubes, magical pecans and certain death.
Other Products
All the other goodness from Hydra Cooperative.
Hydra Sampler 2016
The Hydra Cooperative Sampler 2016—previously available only at Gen Con and North Texas Rpg Con—is now available to everyone! Get a sampling of gameable stuff and fun features related to current and forthcoming Hydra products, including the Mountebank class from Fever-Dreaming Marlinko, the Murmuring Wyrm from Broken Fire Regime, the Cosmic Cat from The Cloud Castle of Azurth, Planet Gogmagog from Strange Stars Fate and even two Operation Unfathomable comic strips!