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 Citadel 's Keeper yet.
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Protect your cities against waves of enemies. Manage your resources and plan accordingly to develop your city and armies to survive!
Steam store description