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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 Portal: System Failure yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Portal: System Failure is an upcoming fan-made mod that expands upon the Portal universe with all-new puzzles and a darker narrative, all to deliver an epic singleplayer campaign. This new, full-length campaign will feature a carefully crafted story with new characters, and a unique soundtrack.
Steam store description