If you're not afraid of losing your mind and know Russian, you can dive into the lore of the Sterlyatomatsky maniac, the Great (Not)Antifurry, the Not Representative of the ultra-right views of the 1930s-1945s, and also a clown and joker—streamer Bebey (orig Бэбэй). Judging by the screenshots, he makes a cameo in this game. But I warn you, the content is not for everyone. YouTube is full of clips from his streams, from humorous game reviews to Let's Plays and reactions to community memes featuring him.
A photo from the game is one of his channel's memes (and one of edited photos of him), often used by his community as creepypasta meme, like "The Intruder" from Mandela's catalog, William Afton, and so on.