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Individual prerelease counts require verified game access. GaugeDB can record a count if Steam publishes one in its public chart, or when collection becomes available after release.
No Steam player count has been recorded for Zombie Protocol yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Zombie Protocol is a hardcore isometric survival sim. Stay alive while caring for your baby—feed, protect, and keep quiet, because zombies react to every sound. Craft gear, drive when you must, and explore procedurally generated cities where every run is unique.
Steam store description