Citadel Zero
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.
71.4Rating
0Content
50Achievements
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About This Game
Citadel Zero is a indie/strategy game with both single-player and multiplayer modes, developed by PYRHAMID Studio and released in 2026. Community ratings across Steam average 71.4/100 — a generally positive reception overall. Players commonly describe it as Roguelite, Strategy, Creature Collector, Tower Defense and PvE.
Media
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User Reviews
71.4
Overall Score / 100
7.1/10
Steam (21 reviews)
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Game Information
Release Date
July 17, 2026
Developer
PYRHAMID Studio
Publisher
PYRHAMID
Platforms
Windows, Mac, Linux
Price
Free to Play
Analytics & Metrics
Free to Play Analytics Unavailable
VISE and VRI models are built on purchase-based data and do not apply to free-to-play titles.
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System Requirements
🪟 Windows
🍎 Mac
🐧 Linux
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
- 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
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
- 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
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
- 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
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