Citadel Zero
PYRHAMID Studio · PYRHAMID · Jul 17, 2026
Delayed observation
Observed
0
Last tracked
2
All-time peak
n/a
Δ 24h
Player count last observed
Live player data is temporarily unavailable; historical values remain visible for context.
Citadel Zero - Steam Charts & Historical Stats
Defend the last citadel on a dying alien world. Explore historical player activity and pricing for Citadel Zero. Player-count data was last observed Sep 26, 2026.
Genre
Indie
Developer
PYRHAMID Studio
Citadel Zero player count and price summary
- Current players
- Unavailable
- All-time peak
- 2
- 24-hour player change
- Unavailable
- Current US price
- Price unavailable
Player count last observed . Values marked unavailable are not estimated.
Media gallery 7 screenshots · 1 videos
Screenshots
Videos
Citadel Zero Trailer
All-Time Peak
2
Sep 2026
Estimated Owners
0 .. 20,000
Estimate via SteamSpy
Player count
Activity Heatmap
UTC+0 (Your Timezone)
2
Peak Activity
0
Avg Activity
4
Active Hours
35%
Sample coverage
Less Active
More Active
0
1
2
3
4
5
6
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Sun
Sunday 0:00
No samples
No samples
Sunday 1:00
0 players · 1 samples
0 players · 1 samples
Sunday 2:00
No samples
No samples
Sunday 3:00
No samples
No samples
Sunday 4:00
0 players · 1 samples
0 players · 1 samples
Sunday 5:00
No samples
No samples
Sunday 6:00
No samples
No samples
Sunday 7:00
0 players · 1 samples
0 players · 1 samples
Sunday 8:00
No samples
No samples
Sunday 9:00
No samples
No samples
Sunday 10:00
0 players · 1 samples
0 players · 1 samples
Sunday 11:00
No samples
No samples
Sunday 12:00
No samples
No samples
Sunday 13:00
0 players · 1 samples
0 players · 1 samples
Sunday 14:00
No samples
No samples
Sunday 15:00
No samples
No samples
Sunday 16:00
0 players · 1 samples
0 players · 1 samples
Sunday 17:00
No samples
No samples
Sunday 18:00
No samples
No samples
Sunday 19:00
0 players · 1 samples
0 players · 1 samples
Sunday 20:00
No samples
No samples
Sunday 21:00
No samples
No samples
Sunday 22:00
No samples
No samples
Sunday 23:00
0 players · 1 samples
0 players · 1 samples
Mon
Monday 0:00
No samples
No samples
Monday 1:00
No samples
No samples
Monday 2:00
0 players · 1 samples
0 players · 1 samples
Monday 3:00
No samples
No samples
Monday 4:00
No samples
No samples
Monday 5:00
0 players · 1 samples
0 players · 1 samples
Monday 6:00
No samples
No samples
Monday 7:00
No samples
No samples
Monday 8:00
0 players · 1 samples
0 players · 1 samples
Monday 9:00
No samples
No samples
Monday 10:00
No samples
No samples
Monday 11:00
0 players · 1 samples
0 players · 1 samples
Monday 12:00
No samples
No samples
Monday 13:00
No samples
No samples
Monday 14:00
0 players · 1 samples
0 players · 1 samples
Monday 15:00
No samples
No samples
Monday 16:00
No samples
No samples
Monday 17:00
0 players · 1 samples
0 players · 1 samples
Monday 18:00
No samples
No samples
Monday 19:00
No samples
No samples
Monday 20:00
No samples
No samples
Monday 21:00
0 players · 1 samples
0 players · 1 samples
Monday 22:00
No samples
No samples
Monday 23:00
No samples
No samples
Tue
Tuesday 0:00
0 players · 1 samples
0 players · 1 samples
Tuesday 1:00
No samples
No samples
Tuesday 2:00
No samples
No samples
Tuesday 3:00
0 players · 1 samples
0 players · 1 samples
Tuesday 4:00
No samples
No samples
Tuesday 5:00
No samples
No samples
Tuesday 6:00
0 players · 1 samples
0 players · 1 samples
Tuesday 7:00
No samples
No samples
Tuesday 8:00
No samples
No samples
Tuesday 9:00
0 players · 1 samples
0 players · 1 samples
Tuesday 10:00
No samples
No samples
Tuesday 11:00
0 players · 1 samples
0 players · 1 samples
Tuesday 12:00
No samples
No samples
Tuesday 13:00
No samples
No samples
Tuesday 14:00
No samples
No samples
Tuesday 15:00
0 players · 1 samples
0 players · 1 samples
Tuesday 16:00
No samples
No samples
Tuesday 17:00
No samples
No samples
Tuesday 18:00
0 players · 1 samples
0 players · 1 samples
Tuesday 19:00
No samples
No samples
Tuesday 20:00
No samples
No samples
Tuesday 21:00
No samples
No samples
Tuesday 22:00
0 players · 1 samples
0 players · 1 samples
Tuesday 23:00
No samples
No samples
Wed
Wednesday 0:00
No samples
No samples
Wednesday 1:00
0 players · 1 samples
0 players · 1 samples
Wednesday 2:00
No samples
No samples
Wednesday 3:00
No samples
No samples
Wednesday 4:00
No samples
No samples
Wednesday 5:00
0 players · 1 samples
0 players · 1 samples
Wednesday 6:00
No samples
No samples
Wednesday 7:00
0 players · 1 samples
0 players · 1 samples
Wednesday 8:00
No samples
No samples
Wednesday 9:00
No samples
No samples
Wednesday 10:00
0 players · 1 samples
0 players · 1 samples
Wednesday 11:00
No samples
No samples
Wednesday 12:00
No samples
No samples
Wednesday 13:00
No samples
No samples
Wednesday 14:00
0 players · 1 samples
0 players · 1 samples
Wednesday 15:00
No samples
No samples
Wednesday 16:00
No samples
No samples
Wednesday 17:00
No samples
No samples
Wednesday 18:00
No samples
No samples
Wednesday 19:00
0 players · 1 samples
0 players · 1 samples
Wednesday 20:00
No samples
No samples
Wednesday 21:00
No samples
No samples
Wednesday 22:00
No samples
No samples
Wednesday 23:00
0 players · 1 samples
0 players · 1 samples
Thu
Thursday 0:00
No samples
No samples
Thursday 1:00
No samples
No samples
Thursday 2:00
0 players · 1 samples
0 players · 1 samples
Thursday 3:00
No samples
No samples
Thursday 4:00
No samples
No samples
Thursday 5:00
0 players · 2 samples
0 players · 2 samples
Thursday 6:00
No samples
No samples
Thursday 7:00
No samples
No samples
Thursday 8:00
0 players · 2 samples
0 players · 2 samples
Thursday 9:00
No samples
No samples
Thursday 10:00
No samples
No samples
Thursday 11:00
0 players · 2 samples
0 players · 2 samples
Thursday 12:00
No samples
No samples
Thursday 13:00
No samples
No samples
Thursday 14:00
0 players · 2 samples
0 players · 2 samples
Thursday 15:00
No samples
No samples
Thursday 16:00
No samples
No samples
Thursday 17:00
0 players · 1 samples
0 players · 1 samples
Thursday 18:00
0 players · 1 samples
0 players · 1 samples
Thursday 19:00
No samples
No samples
Thursday 20:00
No samples
No samples
Thursday 21:00
1 players · 2 samples
1 players · 2 samples
Thursday 22:00
No samples
No samples
Thursday 23:00
No samples
No samples
Fri
Friday 0:00
0 players · 1 samples
0 players · 1 samples
Friday 1:00
0 players · 1 samples
0 players · 1 samples
Friday 2:00
No samples
No samples
Friday 3:00
0 players · 1 samples
0 players · 1 samples
Friday 4:00
0 players · 1 samples
0 players · 1 samples
Friday 5:00
No samples
No samples
Friday 6:00
0 players · 1 samples
0 players · 1 samples
Friday 7:00
1 players · 1 samples
1 players · 1 samples
Friday 8:00
No samples
No samples
Friday 9:00
0 players · 1 samples
0 players · 1 samples
Friday 10:00
0 players · 1 samples
0 players · 1 samples
Friday 11:00
No samples
No samples
Friday 12:00
1 players · 1 samples
1 players · 1 samples
Friday 13:00
0 players · 1 samples
0 players · 1 samples
Friday 14:00
No samples
No samples
Friday 15:00
No samples
No samples
Friday 16:00
0 players · 2 samples
0 players · 2 samples
Friday 17:00
No samples
No samples
Friday 18:00
No samples
No samples
Friday 19:00
No samples
No samples
Friday 20:00
0 players · 2 samples
0 players · 2 samples
Friday 21:00
No samples
No samples
Friday 22:00
No samples
No samples
Friday 23:00
0 players · 2 samples
0 players · 2 samples
Sat
📍
Saturday 0:00
No samples
No samples
Saturday 1:00
No samples
No samples
Saturday 2:00
No samples
No samples
Saturday 3:00
0 players · 1 samples
0 players · 1 samples
Saturday 4:00
No samples
No samples
Saturday 5:00
No samples
No samples
Saturday 6:00
0 players · 1 samples
0 players · 1 samples
Saturday 7:00
No samples
No samples
Saturday 8:00
No samples
No samples
Saturday 9:00
0 players · 1 samples
0 players · 1 samples
Saturday 10:00
No samples
No samples
Saturday 11:00
No samples
No samples
Saturday 12:00
0 players · 1 samples
0 players · 1 samples
Saturday 13:00
No samples
No samples
Saturday 14:00
No samples
No samples
Saturday 15:00
0 players · 1 samples
0 players · 1 samples
Saturday 16:00
No samples
No samples
Saturday 17:00
No samples
No samples
Saturday 18:00
0 players · 1 samples
0 players · 1 samples
Saturday 19:00
No samples
No samples
Saturday 20:00
No samples
No samples
Saturday 21:00
No samples
No samples
Saturday 22:00
2 players · 1 samples
2 players · 1 samples
Saturday 23:00
No samples
No samples
System Requirements
Platform Support
Windows
macOS
Linux
Windows Requirements
Minimum:
Minimum:
- OS: Windows 10 64-bit
- Processor: Intel Core i3 / AMD Ryzen 3 (2018+)
- Memory: 4096 MB RAM
- Graphics: DirectX 11 compatible GPU with WebGL 2.0
- DirectX: Version 11
- Network: Broadband Internet connection
- Storage: 500 MB available space
- Sound Card: Windows Compatible
- Additional Notes: The Steam client must be running.
Recommended:
Recommended:
- OS: Windows 10 64-bit
- Processor: Intel Core i5 / AMD Ryzen 5
- Memory: 8192 MB RAM
- Graphics: Dedicated GPU (NVIDIA GTX 1050+ or AMD equivalent)
- DirectX: Version 11
- Network: Broadband Internet connection
- Storage: 1024 MB available space
- Sound Card: Windows Compatible
macOS Requirements
Minimum:
Minimum:
- OS: macOS 10.15 Catalina or later
- Processor: Apple Silicon (M1) or Intel Core i3 — both supported
- Memory: 4096 MB RAM
- Graphics: Metal-capable GPU (WebGL 2.0)
- Storage: 1024 MB available space
- Sound Card: macOS Compatible
- Additional Notes: The Steam client must be running.
Recommended:
Recommended:
- OS: macOS 12 Monterey or later
- Processor: Apple M1 or newer / Intel Core i5
- Memory: 8192 MB RAM
- Graphics: Apple Silicon GPU or dedicated GPU
- Storage: 1024 MB available space
- Sound Card: macOS Compatible
Linux Requirements
Minimum:
Minimum:
- OS: Ubuntu 22.04+ / SteamOS 3 (64-bit)
- Processor: Intel Core i3 / AMD Ryzen 3 (2018+)
- Memory: 4096 MB RAM
- Graphics: Vulkan or OpenGL 3.3 compatible GPU
- Storage: 1024 MB available space
- Sound Card: PulseAudio or PipeWire
- Additional Notes: The Steam client must be running.
Recommended:
Recommended:
- OS: Ubuntu 22.04+ / SteamOS 3 (64-bit)
- Processor: Intel Core i5 / AMD Ryzen 5
- Memory: 8192 MB RAM
- Graphics: Dedicated GPU (NVIDIA GTX 1050+ or AMD equivalent)
- Storage: 1024 MB available space
- Sound Card: PulseAudio or PipeWire
Pricing
Free to Play
Additional Information
Categories
Single-player
Multi-player
PvP
Online PvP
Steam Achievements
In-App Purchases
Steam Cloud
Steam Leaderboards
Family Sharing
Supported Languages
English, French, German, Spanish - Spain, Simplified Chinese, Russian, Portuguese - Brazil
Additional Information
🏆
Achievements
50
total achievements
Featured:
Citadel Awakened
Bone Reclaimed
🇧🇷
DEJUS Rating
18
Brazilian rating
🇩🇪
Steam Germany
16
German classification
🆘
Support
Developer Analytics
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About This Game
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.
Detailed Description
DEFEND THE LAST CITADEL
The last human citadel stands alone on a dying alien world, watched from the ruins by mutated sentinels. You command its defense. Summon an arsenal of bio-engineered towers, forge a custom loadout, and hold the line across three distinct game modes.
Frequently Asked Questions
Is Citadel Zero free to play?
Yes, Citadel Zero is free to play on Steam.
What genre is Citadel Zero?
Citadel Zero is a Indie, Strategy, Free To Play game.
Who developed Citadel Zero?
Citadel Zero was developed by PYRHAMID Studio and published by PYRHAMID.
What platforms does Citadel Zero support?
Available on Steam for Windows, macOS, Linux.