BreathBound is a 1–4 player co-op horror game built on breath and sound management. In the dark, every breath, step, and collision can draw the Corpse King, who hunts by smell and hearing. Team up to gather resources, distract threats, and rescue each other—know when to risk it and when to retreat.

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About This Demo

Hey there, Friends! Xiao Jiangjiang  has come hopping in to report for duty~ 🧟‍♂️

BreathBound is part of Steam Next Fest from October 19 to 26! Add it to your wishlist now!
Thank you all for your support! The demo has passed 400,000 downloads, and the infection keeps spreading!
Your feedback and support give us the confidence to keep making the game better.

For this Next Fest, we’ve rolled out a special update. The Old Mansion on Nightmare difficulty now has a brand-new main storyline and gameplay. We’ve also polished character interactions, the UI, and the multiplayer experience, and fixed a bunch of issues that were getting you stuck. As for what new secrets are hiding in the Old Mansion... shhh, Little Jiangshi can’t tell!

New Content

  • New main storyline and gameplay for the Old Mansion on Nightmare difficulty. More changes await you to discover for yourself.

  • Updated parts of the Old Mansion layout, with added environmental details and atmosphere effects.

  • Added end-of-match results screens and music for each difficulty.

  • Added a level-completion cutscene (shared across levels).

  • Added the K key to view objective progress.

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The demo currently features the Old Mansion map, with three escalating modes: Normal, Hard, and Nightmare.
If you’ve played the demo, we’d love to hear your honest thoughts in a review. Tell us:

  • Does the Old Mansion feel tense and oppressive enough?

  • Are the three difficulty levels well balanced?

  • Did multiplayer and matchmaking go smoothly?

  • Which parts of the gameplay stood out to you?

  • What still needs improvement?

Whether it’s encouragement, suggestions, or criticism, we read every bit of it carefully. Feel free to share your achievements, playtime, and best moments too, and help more players discover the game.
The demo currently supports public lobbies and friend invites. Grab your friends, step into the Old Mansion, hold your breath, and face the jiangshi!

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- 1-4 player cooperative horror: survival depends on teamwork and role division.

- Breath and sound exposure system: not just hiding from sight, but managing your breath and noise.

- Sightless zombie hunting: the corpse king does not rely on vision, but on smell and hearing.

- Chinese Hong Kong-style environments: ancestral estates, walled campus, public hospital, tong lau tenement buildings, and more.

- Objective progression and rescue loop: sealing, rescuing, hunting, and delivery actions create high-pressure pacing.

- Stream-worthy tension: running, gasping, collisions, bell ringing, and teammate chaos all make for memorable moments.

Welcome to join the player discussion groups:

QQ Group 1: 1106256706

QQ Group 2: 1083871383 (Full)

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

As independent developers, we used some AI-generated art assets to complete the game content. Thank you for your understanding and support!

System Requirements

    Minimum:
    • OS: win 9
    • Memory: 8 GB RAM
    • Graphics: GTX 2060
    • Storage: 10 GB available space
    Recommended:
    • OS: win 10
    • Memory: 16 GB RAM
    • Graphics: GTX 3060
    • Storage: 20 GB available space
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