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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 Zero Boundary Line yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
This indie sci-fi TD has easy controls. Play as a futuristic commander defending humanity from mutants across diverse maps. Beat levels to unlock units: defenders, melee fighters, crowd controllers. Buy unique shop units, mix ability units for powerful custom defense lines.
Steam store description