This is a rule-based psychological horror roleplaying game set inside an old apartment building known as Gray Signal.

Hidden in a forgotten corner of the city, the building is damp, stained, and filled with the smell of mold and decay. Late at night, the old elevator moves on its own, while empty hallways echo with distant running footsteps, knocking sounds, and whispers with no clear source.

You play as the building’s new night-shift manager.

On your very first night, you receive a message on your phone from someone calling himself “Mark, the previous manager.”

The message contains a list of rules for the building.

As the night grows deeper, you begin to realize that something is wrong.

Strange incidents start happening throughout the building, while “Mark” continues sending messages, guiding you on how to deal with them.

Slowly, you become unable to tell whether the building itself is haunted...

or if your perception is being contaminated by something else.

Ps:When creating the bot, I intentionally added many contradictory settings. This mainly becomes noticeable once your contamination level exceeds 80%.

If the bot starts “breaking” later on — for example, repeating dialogue, speaking on your behalf, or describing your actions and thoughts for you — it means your perception has already been contaminated.

Please try restarting the game.