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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 Protocol Zero yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Protocol Zero is a hardcore, realism-driven survival game set somewhere in post-apocalyptic Europe after a global nuclear catastrophe. The world lies in ruins, cities abandoned, landscapes irradiated, and life twisted by mutation. Every choice defines who you become. Remember, you have a choice.
Steam store description