How many people are playing Backrooms Lost Unit Playtest right now?

Backrooms Lost Unit Playtest is app 4288560 on Steam. Player counts appear once the tracker has sampled it.

What is the all-time peak player count of Backrooms Lost Unit Playtest?

0 concurrent players on 1 Oct 2026.

Backrooms Lost Unit Playtest was released on Steam on 9 Apr 2026.

Every depot recorded for this app, sized by its current public manifest.

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Depot ID	Name	Platform	Language	Size on disk	Download size	Current manifest	Status
4288561	—	Windows	—	11.0 GB	10.5 GB