Screenshots
Watch trailer on Steam ↗Breach Signal
O5 Interactive · Published by O5 Interactive · Official site ↗
Last updated 27 Sept 2026
Breach Signal is a 1-6 player co-op cosmic horror game. As a recruit of the FNA, lead expeditions into strange places and investigate mysterious anomalies that threaten our reality.
Action, Adventure, Indie · 2027 · More free games
Embark on eerie expeditions as a Breach Signal recruit, investigating anomalies that threaten reality. Dive into an intense, cooperative horror experience with friends or solo.
About this game
Events & announcements
O5 Interactive will be present at AG French Direct on May 27th to showcase Breach Signal.
We will unveil the game's new trailer for the occasion.
Stay tuned!
About the Game
Breach Signal is a 1–6 player online co-op cosmic horror game. You’ve been recruited into the [REDACTED] program, an initiative led by the para-governmental Federal Normality Agency.
Your mission: investigate dimensional breaches, unstable phenomena that distort reality and open passages to the unknown.
Lead scientific expeditions: identify Anchor Objects, retrieve samples for the Agency, and confront the unexplainable.
Equipped with a cutting-edge technology case and investigation tools, you operate within a retrofuturistic 80s world soaked in cosmic horror and bureaucratic secrecy.
/!\ Once inside the Domes, all contact with the outside is lost.
Semi-Open Map
Explore a stylized, semi-open environment where you can get truly lost… for your own pleasure!
Procedural Investigations
Each expedition is different: randomized spawn points, evolving objectives and dynamic threats ensure no session feels the same.
Analog Tech & Tools
Use unique, retro-futuristic investigation devices such as signal tracker, sampler, scanners and more, to detect anomalous entities and objects.
Stay close to your team... What lies beyond remains unknown.
Team-Based Survival
Work together with 1–6 players in an expedition where communication is essential.
Proximity Voice Chat
Use proximity voice chat to communicate with other recruits, or your Talkie to communicate from a greater range. But be careful, you may not be the only one listening...
Efficient Deployment
Strategic team planning ensures maximum sample recovery! With more credits, better gear follows.
Make it back with samples... and some memories.
System Requirements
Will my PC run this? →Minimum
- OS: To be announced
Supported Languages
Latest news
AnnouncementsOfficial
New Feature: Sample Effects Are Here!
Starting now, you can use them during expeditions to gain (useful?) effects and turn the tide when things go wrong. Current sample abilities include:• Heal yourself or a teammate.• Revive a fallen teammate.• Set enemies (or the environment) on fire.• Freeze targets to slow them down.And that's just the beginning.More sample types and unique effects are already in development, giving you even more ways to adapt to the ever-changing realities of Breach Signal.Every expedition is becoming a little more unpredictable... and a lot more interesting.See you on the field, Recruits.Read full article on Community Announcements (O5 Interactive)AnnouncementsOfficial
Welcome to the FNA, recruit.
The breach is open. Are you ready to teleport? At O5 Interactive, we're thrilled to officially welcome you to Breach Signal, our debut psychological horror co-op game for 1-6 players. Take a look at our very first Reveal Trailer: About Breach Signal You’ve been recruited into the program, an initiative led by the Federal Normality Agency. Your mission? Lead expeditions into unstable zones, investigate reality-breaking anomalies, and return with samples the Agency can use… if you make it back. {STEAM_CLAN_IMAGE}/45068387/3e4a96ddd1a6d14c42df20ccafb438674b6124a4.png Team up with up to 5 other players Use proximity voice chat or your Talkie Deploy retro-futuristic investigation tools Locate Anchor Objects and collect samples Face dynamic threats and randomized objectives The world of Breach Signal is inspired by 80s retro sci-fi, cosmic horror, and bureaucratic secrecy, where analog tech meets unexplainable phenomena... {STEAM_CLAN_IMAGE}/45068387/4c4235601ade8b3ab77b5b96015c73cc5752ee07.png Welcome to the Expedition We’re just getting started. As we continue development, we’ll be sharing more peeks into the tools, anomalies, and secrets of Breach Signal. Join us, help shape the future of the project, and prepare for what’s coming next! Access Granted: join the discussion on Discord Follow our FNA Networks to stay alert to classified updates. Wishlist Breach Signal to support the mission: https://store.steampowered.com/app/2546650/Breach_Signal/ Stay sharp out there, recruit. The signal is… unstable.Read full article on Community Announcements (Lanfey)
