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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 The Outbreak Protocol yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Escape the outbreak with friends! A survivor horror multiplayer experience that will allow you to fight hordes of zombies, escape unique scenarios and most important of all... Survive the outbreak!
Steam store description