Games like The Monstrous Horror Show
Games like The Monstrous Horror Show include Catherine Classic, The Witcher 3: Wild Hunt — Remastered, MiSide, Tales of the Black Forest, and OneShot. We matched them by the tags players give The Monstrous Horror Show on Steam (Side Scroller, Puzzle, Story Rich, Sexual Content, and Nudity): closest matches first, and among equally close ones the better-known games.

Catherine Classic
Shared: Sexual Content · Puzzle · Story Rich

The Witcher 3: Wild Hunt — Remastered
Shared: Story Rich · RPG · Nudity

MiSide
Shared: Story Rich · Sexual Content · Horror

Tales of the Black Forest
Shared: Story Rich · Horror · RPG

OneShot
Shared: Story Rich · Puzzle · Indie

Baldur's Gate 3
Shared: Story Rich · Sexual Content · RPG

OMORI
Shared: Story Rich · Multiple Endings · Horror

Outer Wilds
Shared: Story Rich · Puzzle · Exploration

White Day: A Labyrinth Named School
Shared: Sexual Content · Horror · Nudity

Ib
Shared: Story Rich · Horror · Puzzle

Little Nightmares
Shared: Horror · Puzzle · Story Rich

Little Nightmares II
Shared: Puzzle · Horror · Story Rich

UNREAL LIFE
Shared: Story Rich · Side Scroller · Puzzle

Lunar Mirror
Shared: Sexual Content · Horror · Nudity

Seek Girl:Fog Ⅰ
Shared: Sexual Content · Nudity · Puzzle

Lost
Shared: Sexual Content · Puzzle · Nudity

Summer Memories
Shared: Sexual Content · Nudity · Anime

WILL: A Wonderful World / WILL:美好世界
Shared: Puzzle · Story Rich · RPG

Cyberpunk 2077
Shared: Nudity · Story Rich · RPG

INSIDE
Shared: Story Rich · Horror · Puzzle

YOU and ME and HER: A Love Story
Shared: Sexual Content · Story Rich · Anime

Our End of the World
Shared: Sexual Content · Nudity · Multiple Endings

ParanormalHK
Shared: Sexual Content · Horror · Nudity

Sally Face - Episode One
Shared: Story Rich · Puzzle · Horror