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Cairn 1st Edition

1st Edition
Pillage ancient barrows and steal powerful spellbooks in a woodland of creatures fae and fell
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Third-Party Publishing
Languages: English, Catalan, Chinese, Danish, Finnish, French, German, Icelandic, Italian, Japanese, Lithuanian, Polish, Portuguese, Russian, Scottish Gaelic, Spanish, Toki Pona, Turkish, Ukrainian, Belarusian

Best For

Groups who want dangerous woodland expeditions where equipment defines characters and creative problem-solving matters more than character builds.

Core Mechanic

Roll a d20 equal to or under STR, DEX, or WIL to pass a save; 1 always succeeds and 20 always fails. Attacks deal rolled damage directly, reduced by Armor and then Hit Protection (HP). Damage beyond HP reduces STR and requires a STR save to avoid critical damage.

Diced20
System FamilyOSR
PublisherCairn Press
Year2020
ComplexityHow much there is to learn
Very Low

Roll-under saves and direct damage make the core quick to learn. Most ongoing decisions concern equipment slots and the Fatigue cost of magic.

AvailabilityHow you get the rules
  • Free to tryFull core rulesLegally free as an SRD, PDF, or official web rules
  • Get it nowAvailable nowFree to download or read online
RunnabilityWhat the book gives you to run it
  • ✓IndexFind any rule by page number
  • ✓GM guidanceA chapter on how to run the game
  • ✓Examples of playRules shown in action at the table
  • ✓Quick referenceCheat sheet or summary tables
  • –Cross-referencesRules rarely point to each other by page

4 of 5 book tools found in the core book

Highlights

Equipment and spellcasting Fatigue share ten inventory slots, making magical power compete with carrying useful gear. Scars from attacks that reduce HP to exactly zero can increase attributes or maximum HP, tying mechanical growth to surviving danger. Characters can gain new abilities through training and experiences in the fiction rather than following classes or levels.

Considerations

Attacks require no to-hit roll, making avoiding or controlling a fight more important than relying on a missed attack. Spellbooks cannot be copied or manufactured, leaving new spell acquisition dependent on discoveries in the world. The core leaves exploration timing to the Warden rather than providing a dungeon-turn or wilderness-travel procedure.

Creator information

Third-Party Publishing

Commercial publishing allowed
RouteOpen license
Commercial useAllowed with conditions
LicenseCC BY-SA 4.0
What it covers

The first-edition rules text may be copied and adapted commercially with attribution and ShareAlike terms; this text license does not grant trademark or unrelated artwork rights.

Read official terms Verified 2026-10-10 · Summary only, not legal advice. Check current terms before publishing.

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