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Backrooms Lost Dimension
Backrooms: Lost Dimension is a single-player horror game with puzzles, survival, and an original story. Explore mysterious levels, journey through unknown dimensions, and uncover hidden secrets along the way. Play the first chapter for free and continue the adventure by unlocking the next ones.

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Features
Single-player
Steam Achievements
Commentary available
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔ ✔
French ✔ ✔
Italian ✔ ✔ ✔
German ✔ ✔
Spanish - Spain ✔ ✔
Portuguese - Portugal ✔
Turkish ✔
See all 7 supported languages

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“I want players to experience the game during development in order to gather valuable feedback and shape the final experience together with the community.”

Approximately how long will this game be in Early Access?

“My estimate is over 1 year. The duration will depend on the amount of content and polish added along the way.”

How is the full version planned to differ from the Early Access version?

“The plan is to expand the game by adding more content (new levels, extra modes, additional features). Some elements are still in the design phase, so the full version is intended to offer a broader and more polished experience compared to the current Early Access. We are also considering adding multiplayer at a later stage.”

What is the current state of the Early Access version?

“The current version includes 10 initial levels. These levels are fully playable and represent the foundation of the experience. Future updates are planned to expand the content and improve the overall gameplay based on community feedback.”

Will the game be priced differently during and after Early Access?

“No. The price will not change during or after Early Access. The first chapter will be free, and the following chapters can be unlocked using currency earned in-game.”

How are you planning on involving the Community in your development process?

“The community will actively guide the development of the game. Feedback collected from Discord, YouTube, and other platforms is essential: many ideas and improvements will come directly from the players.”
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Download Backrooms Lost Dimension Demo

This game is not yet available on Steam

Planned Release Date: Jun 16, 2026

This game plans to unlock in approximately 2 weeks

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About This Game

Backrooms: Lost Dimension is a single-player horror adventure. Explore unsettling levels, solve unique puzzles, and survive terrifying encounters while following an original story.

Free to Play:

Download the game for free and experience the full first chapter at no cost while exploring the first mysterious dimensions of Backrooms: Lost Dimension.

New Chapters and Original Levels:

Continue the story through new paid chapters, each featuring iconic and original levels, disturbing environments, new puzzles, and hidden secrets to uncover.

An Expanding Story:

Discover new story fragments chapter after chapter as you travel through increasingly strange and dangerous dimensions.

We need your support to make The Lost Dimension the ultimate Backrooms experience! Adding the game to your wishlist helps us reach more players and shows the community that you want to see this world fully realized.

By wishlist-ing, you’ll be the first to get updates, news, and sneak peeks as we continue developing new levels, puzzles, and multiplayer features. Join us on this journey and help shape the game!

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Artificial Intelligence is not used to build the entire game or to replace the role of the developer. Instead, it is used as a tool to speed up the development process. Some assets, such as certain songs or 3D meshes, may be initially generated with the help of AI, but they are always refined, edited, and improved by the developer to ensure they meet the required quality standards and remain fully original.

Mature Content Description

The developers describe the content like this:

This game contains horror themes, jumpscares, and in some cases environments or jumpscares may include depictions of blood. There are no depictions of sexual content, drug use, or self-harm.

System Requirements

    Minimum:
    • OS: Windows 10/11 64-bit
    • Processor: Intel Core i5-8400 / AMD Ryzen 5 2600
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GTX 1060 6 GB / AMD RX 580 8 GB
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 6 GB available space
    Recommended:
    • OS: Windows 10/11 64-bit
    • Processor: Intel Core i7-10700K / AMD Ryzen 7 3700X
    • Memory: 16 GB RAM
    • Graphics: NVIDIA RTX 3060 Ti / AMD RX 6700 XT
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 6 GB available space
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