The Citadel Project
The Citadel Project is a first-person stealth game with strong horror elements, heavily inspired by the Thief series and set in a dark fantasy world. Use your tools and surroundings wisely, stay hidden in the shadows, and uncover the dark secrets behind the Citadel's downfall.
Last Updated: 6/15/2026
| Developer | Reliquary Software |
| Publisher | Reliquary Software |
| Steam App Id | 4795460 |
The Citadel Project
The Citadel Project is a first-person stealth game with strong horror elements, heavily inspired by the Thief series and set in a dark fantasy world. Use your tools and surroundings wisely, stay hidden in the shadows, and uncover the dark secrets behind the Citadel's downfall.
Last Updated: 6/15/2026
- Windows
- Mac
- Linux
About The Citadel Project
The Citadel Project is an Adventure game developed by Reliquary Software. It was released on the Steam Store by Reliquary Software.
It can be played and ran on Windows systems. At the moment, there is no confirmed information regarding Steam Deck support for this game.
According to Steam’s category system, The Citadel Project supports the following features:
- Single-player
- Family Sharing
Media & Sceenshots
Watch the featured video for The Citadel Project and see the latest screenshots from the Steam Store.
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Soures & References
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The Citadel Project data has been sourced from:
- Valve Corporation. (2026, June 15). The Citadel Project on Steam. Steam Store.
- Valve Corporation. (2026, June 15). The Citadel Project. Steam Community Hub.