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272 recorded observations · Latest sample
UTC
| Month | Peak players | Peak change | Average players |
|---|---|---|---|
| October 2026 | Peak1 | Peak change−1Peak percentage change: −50.0% | Average0 |
GaugeDB’s latest recorded Steam player count for Citadel Zero is 0 concurrent players (). Its recorded 24-hour peak is 0 players. The highest count in GaugeDB’s collected history is 2 concurrent players on .
Concurrent Steam players, not daily or monthly active users. Console and other launchers are excluded. Peaks cover GaugeDB’s recorded history.
Defend the last citadel on a dying alien world. Summon a gacha collection of bio-engineered defense towers, forge a custom loadout, and conquer three modes, story-driven Chronicle, roguelite Contracts, and 1v1 PvP Ascension. Tower defense meets deck-building meta-progression.
Steam store description
| September 2026 | Peak2 | Peak change—Peak percentage change: — | Average0Average percentage change: — |
Based on recorded samples. Changes compare consecutive months; coverage may be partial.