The Monster Inside

A noir visual novel about a detective investigating supernatural crimes

Random Seed Games · Released Aug 1, 2017

Reviews: Very Positive; 88% of 2,373
Recent reviews: Very Positive; 88% of 18 in 30 days
Players: 0; daily peak, Oct 29, 2026
Steam Deck: Verified
Last update on Steam: 1 month ago; Sep 18, 2026
Minimum PC: 0.1 GB disk; Full requirements

What is The Monster Inside?

This free, single-player text adventure follows a private investigator managing a strange illness in a world of beasts and magic. You read the story and click through crime scenes across seven chapters and four diorama-like environments.

For you if...

+you enjoy dark mysteries with a psychological horror tone

Not for you if...

−you want a long campaign rather than a short story

What players say

88% of 2,373 reviews are positive · 88% of 18 in the last 30 days

Players praise the minimalist artwork, noir soundtrack, and story. Common complaints focus on limited detective work and choices that seem to have little effect.

Screenshots and trailer

The Monster Inside system requirements

Minimum: 0.1 GB of disk space.

As published by the developer.

Can my PC run The Monster Inside?

The published requirements do not name a graphics card we can compare.

Set up my PC →

Minimum

OS: Windows XP SP2+
Storage: 130 MB available space

Does The Monster Inside have co-op or multiplayer?

No: single-player only, no multiplayer modes declared.

Single-player

Does The Monster Inside run on Steam Deck?

Verified Yes, Verified by Valve: it works on Steam Deck out of the box.

All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
In-game text is legible on Steam Deck
Default graphics settings perform well on Steam Deck

PC version details

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows, macOS, Linux
Achievements: 7
Steam features: Family Sharing
Languages: Full audio: English.

Does The Monster Inside use AI-generated content?

No AI-generated content is disclosed on the game's Steam page.

Self-reported by the developer under Steam rules: it covers AI content that ships in the game, not tools used to make it. Steam page checked on Oct 27, 2026. How to filter AI games on Steam