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The Expansion

発売済み

JMO INTERACTIVE掲載日 Sep 21, 2026

About the game

果てしないBackroomsを舞台にした、一人称視点のサイコロジカルホラー体験。放棄された廊下を探索し、隠された秘密を暴き、謎の存在から逃れ、曲がり角を曲がるたびに未知の奥深くへと導かれる世界で生き延びよう。

Steamの原文説明

THE EXPANSION – A Backrooms Experience

You weren't supposed to end up here.

One moment everything was normal. The next, you find yourself trapped inside an endless maze of yellow walls, buzzing fluorescent lights, empty hallways, and places that shouldn't exist.

But you're not alone.

THE EXPANSION is a first-person psychological horror experience inspired by the unsettling atmosphere of the Backrooms. Explore strange environments, uncover new areas, and survive the entities hiding within them.

🚪 3 Levels to Explore

👁️ You're not alone.
👹 Terrifying Entities
📼 VHS Found-Footage Horror
🎧 Immersive Atmosphere & Jumpscares

Explore. Survive. Find a way out.

🟨 LEVEL 1 – THE BACKROOMS

🏊 LEVEL 2 – THE POOLROOMS

🔴 LEVEL 3 – MARS OUTPOST

The Expansion is my first solo-developed game. I spent over a year creating it, learning, improving, and bringing my vision of the Backrooms to life. Every environment, mechanic, and detail was created with passion and care.

Thank you for supporting my journey as an independent game developer. Your support helps me continue improving The Expansion and creating even more content in the future.

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