To the passengers, it’s a tragedy. To the Royal Navy, it’s a terrifying sabotage. To the cultists, it’s an ascension. To the Deep Ones, it’s a heist. To the Mi-Go, it’s a harvest. To the universe... it’s a rounding error.
This document is the Master Narrative Tool for the GM. It explains how to thread the needle between a highly logical, multi-faction conflict (the explainable) and the mind-bending reality of an Outer God waking up (the unexplainable).
At its core, this survival horror scenario is a four-way Mexican Standoff trapped in a tin can floating over the deepest part of the ocean (Point Nemo).
If the investigators do absolutely nothing, here is how the night resolves:
The Sabotage: The Mi-Go have already killed the engines and are silently converting the lower decks (Boiler/Engine rooms) into a fungal brain-harvesting factory.
The Ritual: Martin Bell (The Voice) and Aubree Woods (The Shield) are using the stolen Star-Seed of Dagon in "The Void Beneath" to force Cthulhu to wake up, utilizing the psychic terror of the passengers as fuel.
The Heist: Ybryxu (The Deep One Assassin) is hunting for the Star-Seed, intending to slaughter the cultists and punch a hole in the hull so the ship sinks, taking the relic back to the bottom of the ocean.
The Vain Defense: The Royal Navy detachment, fighting completely blind to the cosmic truths, is bleeding out in the boiler rooms and hallways, trying desperately to save a ship that is already doomed.
The GM's Job: Drop the investigators in the middle and let their actions disrupt these automated plans. If they take the Star-Seed, they become the target of everyone. If they help the Navy, they get bogged down in a zombie-fungus war. If they hunt the Cult, they might accidentally help the Deep Ones sink the ship.
While the factions have logical goals, the environment itself should stop making sense as the night progresses. The 200lb Star-Seed of Dagon and Martin Bell's chanting are acting like a drill, boring a hole through standard spacetime into the dreamscape of R'lyeh.
As the ritual progresses (from midnight to 6:00 AM), the RMS Olympic should undergo a Liminal Shift:
Geometrical Breakdown (Non-Euclidean Architecture): Hallways stretch endlessly. A door in First Class might suddenly open into the flooded Third Class boiler room. The angles of the grand staircase feel "wrong" and induce vertigo.
Temporal Fractures: Clocks on the ship spin wildly or stop completely. Investigators might hear their own screams from an hour in the future, or find the skeletal remains of a passenger they just spoke to. This is what attracts Sir Zachariah Lowe (The Hound of Tindalos), who hunts in these broken angles of time.
The Unseen Observer: Give the players the profound, crushing dread that something massive beneath the water is slowly turning its attention toward the ship. The ocean outside the windows shouldn't just look dark; it should look like an endless, starless sky looking back at them.
Because this is a cosmic horror game, "winning" is highly subjective. Here are the likely resolutions:
The Heroic Sacrifice: The investigators secure the Star-Seed of Dagon and throw it overboard, or they blow up the ship's boilers themselves, sinking the Olympic to stop Martin Bell and the Mi-Go. Everyone dies, but humanity lives another day.
The Escape: The investigators manage to secure a lifeboat alongside Isaac Young or a few surviving passengers. They watch as the Olympic is swallowed by a massive, non-Euclidean whirlpool, knowing nobody will ever believe their story.
The Dark Ascendancy (Failure): The ritual finishes. Lacie Hill absorbs the psychic energy and becomes the Avatar of the Sunken God. The ship doesn't sink—it is elevated, floating in the sky above a boiling ocean as the stars rearrange themselves. The investigators lose their minds as the world ends.
The Ybryxu Bargain: The investigators hand the Star-Seed to the Deep One assassin. She slaughters Martin Bell, breaches the hull, and allows the players to take a lifeboat before she takes her prize back to the abyss. They survive, but with the chilling knowledge that they actively aided an immortal monster.