Steam
Sector 404
Also known as Sector 404, s4, sector 404
Sector 404 is a first-person anomaly horror game set in a crumbling Soviet housing block. After taking your medicine, your world begins to fracture. Climb from floor to floor, uncovering distorted anomalies and your own unraveling mind. Miss too much, and reality resets. Will you ever make it home?
Last update
7 Aug 2026
Latest update
Update history
Browse past updates and patch notes for this game.
12 updates
October 2025
- 10/23/2025 UpdateImproved lighting in dark areas for better gameplay experience Corrected several in-game text errors for smoother reading and better clarity Certain anomalies have been made more noticeable, helping players spot key int…
- 10/09/2025 UpdateMinor Bug Fixes
September 2025
- 09/17/2025 UpdateMade lightning more visible in some areas Fixed a few oversized colliders Smoothed out player movement
- 09/10/2025 UpdateMinor Bug Fixes
August 2025
- 08/13/2025 Big UpdateAdded a new ending scene: a strange room appears when the player finds all 80 anomalies Removed head bob Minor bug fixes
- 08/09/2025 UpdateMade the interaction key respond faster Improved the exposure settings
- 08/04/2025 UpdateMinor bug fixes Improved anomaly visibility
July 2025
- 07/29/2025 UpdateRemoved unnecessary interactions Fixed bugs related to anomalies Fixed issue where the interaction UI was not displaying properly Added support for 10 new languages in our game: Russian German Korean Spanish Simplified…
- 07/26/2025 Fixes & ImprovementsAnomalies now reset after reaching 80/80 Prevents players from skipping the game. The counter resets to 00/80, and anomalies start spawning again. Anomaly behavior improved Better placement, more intensity, and more eng…
- 07/17/2025 UpdateImproved visibility of in-game interactions Fixed several anomaly-related issues Added exposure adjustment setting Resolved bug with anomaly detector Added achievements
- 07/16/2025 UpdateImproved UI Expanded resolution setting support Fixed various anomalies Added manual reset option for anomalies via settings Updated tutorial Resolved menu volume save issue
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