As of July 9th 2025, Headlocker released a side game of 404 called MXM 404. DO NOT get it mixed up with the base game.

This game takes place before the main events of Monster X Mediator, where you play as one of 404's previous victims. It's extremely short, and only has 2 endings.
It has SO MUCH triggering content, as the dev clearly outlines every single one on her page, thank god. Remember when I said the dev makes shit with taboo subjects? Well, since she's a traumatized individual and kind of makes whatever she wants, this is one of those games of hers.
However, I am so serious when I say that this game is SO unserious. Personally, this game wasn't my cup-of-tea. It's only worth playing if youre grossily obsessed with 404 and don't mind the trigger warnigns lol.
I read the script of this game, and uh... it has a totally different tone without the bg music. (it's still played up as unserious though)
I do like some of the still images in this side-game,SOME...
I must repeat, DO NOT MIX UP MXM 404 WITH MONSTER X MEDIATOR!! THEY ARE NOT THE SAME GAME!
Anyways I'm super normal about this frame.