2021 · コアルール（プレイに必要な最小限）

ARC: Doom Tabletop RPG

A fantasy tabletop roleplaying game about adventurers facing an approaching doom. The system combines in-story decisions with real-time pressure through a Doomsday Clock, which sets the available time for a campaign and introduces new complications as it advances. Players overcome challenges by setting a Threshold Number and rolling a six-sided die: results below succeed, results above fail, and matching the threshold creates additional complications. Characters apply their abilities through creative approaches, accept consequences, and cast spells or techniques that require unusual rituals to restore. The rules support any setting and include guidance for session zero, shared stakes, story structure, and player-driven consequences, along with optional items, spells, techniques, and strange creatures.

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