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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 Versus yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Portal Versus introduces live time trials so you can race a friend in real-time in Portal 2s standard maps. Your goal is to complete the test chamber before the other tester.
Steam store description