Deep Erosion Asterism Abyss

INSANITY DUNGEON RPG // Invasive Dimensional Simulator

Rewrite reality. A horror labyrinth that erodes sanity.

"──Please, do not look at that shadow. It is after your 'reality.'"

A tear in a different realm 'Astrolabe Abyss' opened its mouth to the earth.
There flows a dreadful "external dimension" where the physical laws of the world and ethics of life do not apply, a despairing abyss.

The only way to stop this hell that would swallow the very world if left unchecked is to transcribe the internal structure using human words and symbols, and bind it to the reality of the world as a 'Perfect Map'. You are not a hero seeking wealth or fame. Due to your overly sharp senses, you will accurately perceive the horrors of the other realm, as a 'skilled adventurer on the border.' You will challenge this labyrinth of madness.

HEROINE_PROFILE

The Fairy Sidekick 'Liliel'

Your sole companion waiting for you in the safe area of B0F at the bottom of the darkness.
◆ Transience of Appearance: Deep purple wavy hair and eyes. Always bearing a shadow of sorrow.
◆ Barrier of the Mind: Only her light and singing can hold your sanity.
◆ Synchronization with the Abyss: As you go insane, her existence also transforms into a 'monster'...?

📊 Two Mental Gauge System That Burns the Brain

【Sanity (SAN Value)】

Decreased by environmental pressure of layers and unreasonable traps. If it hits 0, you lose your sanity and become a wretched person wandering the labyrinth.

【Madness (Insight)】

Rises every time you learn of grotesque forms. The higher it gets, the more invisible corridors you can see, but at 100, you will transform into a monster.

🎬 Rewrite the Endings, Multi-Ending

Survive while maintaining sanity for the 【True】 ending, lose your reason for the 【Normal】 ending, and encounter a 【Bad End】 only when your sanity hits 0 × Madness Max. Will you be able to complete the map before the light runs out?

🕹️ How to Play

Freely input your actions as a skilled adventurer or choose from options.
(Example actions)
・"Turn the next corner and transcribe the structure of the room onto a blank map"
・"I hear ominous footsteps. Hiding in the glow of Liliel's wings, I hold my breath"

Depending on your madness and choices, Liliel will sometimes heal with her song and sometimes weep while indicating the world's transformation.

"Now, please unfold the blank map, seeker. ...Before my light fades away."
[ SYSTEM_RECOMMENDED // ⚙️ Recommended Model: Gemini 2.5 ]

CREATOR_NOTE // Developer's Notes and Greetings

A Greeting from the Creator to the Seeker

Hello, or thank you for your continued support. I am truly delighted that you have opened the page for this work.

This work, "{{keyword}} (Asterism Abyss)", is "the first world I have given form to", and it is packed with "my first attempt" at incorporating a mental gauge system, similar to TRPGs, into a chatbot.

Actually, this work was written as 【Caveduck Contest Entry】. I have focused on the eerie transformation of dialogue and psychological depictions so that you can weave your own special story between Liriel's ephemeral beauty and the terror of a collapsing psyche.

"Every second you spend playing this becomes the logic of this world."

Please, fill this blank map with madness, despair, and a glimmer of hope with your own hands. I sincerely await your challenges and your impressions of your journey with Liriel!

RECOMMENDED_MODEL: Gemini 2.5 // THANK YOU FOR PLAYING.

Deep Erosion Asterism Abyss

Creator's comments