Download size

How many GB is Backrooms: The Last Observer?

5 GB

That is more than the typical Puzzle game, which needs about 3 GB.

Leave at least 11 GB free: games need headroom to unpack updates.

The figure is the storage Steam lists as required for this game, not a measured download.

Backrooms: The Last Observer is a cooperative horror game. Descend into something that resists understanding, where perception itself begins to fracture. You are here not to fight, but to witness — and sometimes, witnessing is the worst thing you can do.