Coriolis: The Great Dark Core Rulebook is a 2025 role-playing game supplement published by Free League Publishing for Coriolis: The Great Dark.
Contents Coriolis: The Great Dark Core Rulebook is a supplement in which Explorers venture from a dying Ship City into Blight‑tainted ruins and the perilous Slipstream to uncover ancient secrets that may unlock a future beyond the fading star portals.
Publication history A quickstart version was released in 2024. Coriolis: The Great Dark Core Rulebook was released in August 2025.
Reception Coriolis: The Great Dark Core Rulebook was nominated for "Best Game" and "Product of the Year" for the 2026 ENNIE Awards.
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