Backrooms #999999999
Backrooms #999999999 is a singleplayer/4 player co-op horror exploration game. Unlock the puzzles, survive the entities, escape the deadly geometry and try to reach the final level in one piece. Good luck, wanderer!
Last Updated: 11/9/2025
Backrooms #999999999
Backrooms #999999999 is a singleplayer/4 player co-op horror exploration game. Unlock the puzzles, survive the entities, escape the deadly geometry and try to reach the final level in one piece. Good luck, wanderer!
Last Updated: 11/9/2025
- Windows
- Mac
- Linux
About Backrooms #999999999
Backrooms #999999999 is an Action, and Indie game developed by Claaudius. It was released on the Steam Store by Claaudius.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
According to Steam’s category system, Backrooms #999999999 supports the following features:
- Multi-player
- Single-player
- Family Sharing
Media & Sceenshots
Watch the featured video for Backrooms #999999999 and see the latest screenshots from the Steam Store.
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Features & Categories
Frequently Asked Questions
Soures & References
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Backrooms #999999999 data has been sourced from:
- Valve Corporation. (2025, November 9). Backrooms #999999999 on Steam. Steam Store.
- Valve Corporation. (2025, November 9). Backrooms #999999999. Steam Community Hub.