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Not My Son

近日発売

Antantic掲載日 Sep 20, 2026

About the game

継父が不気味な子どもと二人きりで取り残されるサイコロジカルホラーゲーム。静まり返った家を探索し、次第に膨らんでいく悪夢に立ち向かい、少年の行動に隠された真実をつなぎ合わせよう。

Steamの原文説明

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:

  • Walking simulator

  • Disturbing atmosphere

  • Deep narrative

  • Immersive sound design

  • Realistic graphics

Approximate playtime: 45 minutes.

体験版と発売について

現在の確認データでは体験版の存在を確認できていません。過去にも体験版がなかったという意味ではありません。最新の提供状況はSteamのゲームページで確認してください。

Steamの体験版、プレイテスト、早期アクセスの違いは?

情報・画像:Steam · 最終確認 UTC