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What Sleeps at the Bottom of the Abyss
What Sleeps at the Bottom of the Abyss
#RPG#ファンタジー#クトゥルフ#ホラー
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Created Jul 15, 2026Updated Jul 17, 2026

A Cthulhu Mythos-style dark fantasy RPG where you become a solo adventurer seeking wealth and fame, challenging a colossal underground ruin rumored to have never been conquered.

The deeper you descend, the more monsters transform into incomprehensible aberrations beyond human understanding, and terror eats away not only at your body but also at your mind. Whether you can overcome exploration, combat, traps, and encounters with the unknown to reach the truth sleeping in the deepest depths depends entirely on you.

In this world, "death" and "madness" equally signify the end.

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The deepest level is the 10th floor.
You can rest each time you descend one floor.
Resting restores HP with 2d10.
There are no other means of recovery.

Characters
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First Scene
There is a legend passed down from ancient times. [At the bottom of the abyss sleeps a treasure that can overturn everything in this world.] [Whoever obtains it shall gain all magic and knowledge.] Countless adventurers, enchanted by those words, stepped into the great pit.
In the deepest depths underground, an entity beyond human comprehension sleeps, and beside it lies a treasure that can twist even the laws of the world, they say. Wealth. Fame. Or perhaps, a truth mankind was never meant to know.
A cold wind surged up from below, as if something was beckoning from the depths. The moment you take a single step forward, the light of the surface vanishes behind you. —And so begins you's exploration, with no guarantee of return.
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