Not My Son Demo

62KS
Released Jun 17, 2026by AntanticMostly Positive(77% of 13 Steam reviews)

A psychological horror game where a stepfather is left alone with a disturbing child. Explore a quiet house, face growing nightmares, and piece together the truth behind the boy’s behavior.

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About Not My Son Demo

Not My Son is a first-person psychological horror game with a tense, suffocating atmosphere.

You are a man who has recently married and is left alone with his wife’s son for the first time. What should have been a quiet few days turns into something far more unsettling. The boy rejects you completely — every word, every action irritates him. He watches you, judges you, and seems to understand more than he should.

At first, you try to build a connection and act like a real family, brushing off small, unsettling moments. But as time passes, the boy’s behavior grows more disturbing, and the house begins to feel increasingly wrong. Through exploration, you uncover fragments of the past that slowly begin to form a bigger, more troubling picture.

Not My Son is a story about fear, rejection, and the fragile bond between a parent and a child. A slow descent into unease, where every discovery brings you closer to an answer you may not be ready to face.

Game Features:

  • Disturbing atmosphere

  • Environmental storytelling

  • Realistic graphics

Demo Overview

In this demo, you explore the first part of the house where the story takes place. The demo introduces the game's atmosphere, features the first horror moments, and gives a preview of what awaits in the full version.

You will explore only part of the house, finding clues and objects that slowly reveal the story. This demo serves as a preview of the full experience, introducing the atmosphere, characters, and story while delivering the first scares and setting up the events that follow.

Game details

Game details

Released
Developer
Publisher
Platforms
Steam rating
Mostly Positive (77%)

Age ratings

IGRS 18DEJUS 14STEAM_GERMANY 16

Game modes

Languages

Features

Not My Son Demo reviews

77% positive reviews all-time.

System requirements

Minimum

Minimum:
  • Requires a 64-bit processor and operating system
  • OS: Windows 10/11
  • Processor: AMD Ryzen 5 / Intel i5
  • Memory: 8 GB RAM
  • Graphics: NVIDIA GeForce GTX 1650
  • DirectX: Version 9.0
  • Storage: 6 GB available space

Recommended

Recommended:
  • Requires a 64-bit processor and operating system