Citadel Zero
Live player count and Steam charts
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.
Player history
Each point is the highest number of players online in that day (UTC). Recorded by Steamalytics every hour since July 17, 2026. Zoom in for finer detail.
Monthly player counts
| Month | Avg players | Gain | % gain | Peak |
|---|---|---|---|---|
| Jul 2026 * | 1 | — | — | 7 |
* current month, data so far
Recent updates
- Jul 26, 2026PATCH NOTE 0.2.3 - Citadel Zero
- Jul 23, 2026PATCH NOTE (Hotfix) 0.2.2 - Citadel Zero
- Jul 21, 2026PATCH NOTE 0.2.1 - Citadel Zero
- Jul 20, 2026PATCH NOTE 0.2.0 - Citadel Zero
- Jul 20, 2026PATCH NOTE (Hotfix) 0.1.2 - Citadel Zero
- Jul 19, 2026PATCH NOTE (Hotfix) 0.1.1 - Citadel Zero
When people play
Average concurrent players by day and hour over the last 13 days, shown in .
Daily activity peaks around 18:00 — a pattern consistent with a player base concentrated in Europe, the Middle East & Africa. Steam publishes no per-country player data, so this is inferred from play times.
Achievements
Every achievement in the game, ordered from most to least earned (#1 is the one the most players have). Height is the share of all players who have it; the dashed line is the median. Global rates from Steam.
