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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!
“Backrooms 999999999” is an action-adventure game featuring indie, dungeons and escape room elements, developed by Claaudius for PC and released in 2026. The game offers single-player gameplay and features cooperative play. Available on Steam.
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