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Cthulhu d100

A rules set for roleplaying in the Cthulhu Mythos presented in Spanish, built on a percentile (d100) resolution system. It provides character creation, task resolution, sanity mechanics, and other core rules intended to be compatible with common BRP-style Mythos materials. The system emphasizes usability with mechanics that mirror established Chaosium methods, allowing reuse of published adventures and supplements with minimal conversion. Rules and guidance are organized for free distribution to support play in the Mythos setting.

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