Project Moon 

The Korea Game Developer Team That Make a Game Such a Lobotomy Corporation, Library of Ruina and The Latest, Limbus Company.

A : Have You Try Project Moon's Game?
B: No, and I don't want to

A: Ok.

Project Moon by Tuffoe October 29, 2023

Project Moon Syndrome 

A condition in which a person experiences difficulty with determining the gender of a Project Moon character.

This occurs most often in new fans to the series, as a result of the androgynous design of many characters- notable ones being Argalia (Library of Ruina), Netzach (Library of Ruina), and Hong Lu (Limbus Company).

“I can’t tell if Netzach is a boy or a girl.”
“Sounds like you have Project Moon syndrome.”

Project Moon Syndrome by Enkephalin Addict February 21, 2024

Project Moon sleeper agent 

Fans of games made by indie developer Project Moon that will appear almost anywhere if one of their triggers is said or featured otherwise, examples include but are not limited to:

Red mist, name of a prominent character
Ideal, prominent theme for a story
A black mask covering someone’s entire face, a reference to another prominent character

Despite Project Moon having a statistically smaller fanbase compared to larger fandoms, sleeper agents will arrive in large numbers almost anywhere if any trigger is detected.
The name Project Moon sleeper agent comes from the fact that these persons will activate a set of behaviour when specific triggers are triggered like any sleeper agent and are fans of Project Moon, therefore Project Moon sleeper agents.

Person 1: Grr I’m so angry at person 2 I’m going to turn them into a fine red mist.
Sleeper agent 1: Bait used to be believable- holy shit is that the Red Mist.
Sleeper agent 2: The red WHAT?
Person 3: Oh the Project Moon sleeper agents are here.
Sleeper agent 3: Everyone get in here: summon a limbillion Project Moon fans

Project Moon sleeper agent by Xavagery May 6, 2024

Project Moon Slop

A term used by Roblox and TikTok users to define unnecessary allusions to the Korean game studio Project Moon in the aforementioned Roblox games. Often used in a derogatory way to make fun of these devs who add these references in to either make money, or for the sake of adding references to the franchise.

Yo, bro, did you hear? They added Roland from Library of Ruina to *insert random game name here*

Great, more Project Moon Slop on this platform!

Project Moon Slop by Kizzmonkey January 1, 2026