- New Bundle Available with Backrooms Level X! - 29 July 2026
Great news! A brand new Steam bundle featuring In Silent Walls: Sujet 13 and Backrooms Level X is now available!If you enjoy tense, atmospheric horror experiences, this is a great opportunity to discover two different indie horror games while enjoying an extra discount. A huge thank you to the Backrooms Level X team for this collaboration! If you haven't checked out their game yet, be sure to take a look. And if you enjoyed In Silent Walls: Sujet 13, this bundle is a great way to support two passionate indie developers.Thank you all for your incredible support, and stay tuned... more surprises are on the way! See you soon in the halls of Red Hollow. Hollow Signal Games
- Our First Steam Bundle is Live! - 27 July 2026
Hello everyone!We're happy to announce the very first Steam bundle for In Silent Walls: Sujet 13!We've teamed up with the developer of After Prologue to create a bundle for players who enjoy atmospheric indie horror experiences.If you've been thinking about discovering both games, now is the perfect opportunity.Thank you so much for your support. More is coming for the world of In Silent Walls. A big thank you to the developer of After Prologue for making this first bundle possible!
- In Silent Walls: Origines is now available to wishlist on Steam. - 9 March 2026
After In Silent Walls: Sujet 13, I’m very happy to announce that the next game in the series, In Silent Walls: Origines, now has its own Steam page.This time, the story will take you long before the events of Sujet 13, into a new nightmare connected to the Ashford Manor. A darker atmosphere, a richer world, and a more ambitious experience await you.If you would like to support the project right now, you can add it to your wishlist here: A huge thank you to everyone who continues to support the In Silent Walls universe. Your support, your messages, and your wishlists truly help the series grow. ❤️ Hollow Signal Games
- Major Performance Update - 23 January 2026
In Silent Walls: Subject 13 — Major Performance UpdateAfter weeks of deep optimization, I’m proud to release a major performance update focused on stability and smoother gameplay.What’s new Global GPU optimization (lighting, Lumen, heavy scenes) Fully optimized outdoor foliage Lighting system refactorRect Lights removedFlickering lights converted to Point LightsSecondary lights optimized Level cleanup & streaming fixes (hidden duplicates removed) Much more stable FPS ResultLower GPU usageLess stutterA smoother, more immersive experienceThank you all for your support. This is my very first game, and your feedback pushed me to keep improving it. Thank you for being here.
- Thank you !!! - 22 December 2025
I just wanted to take a moment to say thank you.In Silent Walls is my very first game, and thanks to your feedback, I’ve been able to make a few improvements to enhance the experience.I’d like to thank all the players, as well as the creators and streamers who take the time to discover and share the game.Your support, messages, and curiosity truly mean a lot to me.Thank you for giving this very personal project a chance.Rudy / Hollow Signal GamesWishing you all a wonderful holiday season. ːsteamhappyː
- In Silent Walls : Sujet 13 Update – Comfort & Performance Improvements - 15 December 2025
Hello everyone,Thank you for the first feedback on In Silent Walls: Subject 13. Your comments are incredibly valuable and help me improve the experience while staying true to the game’s atmosphere.Changes in this update:Added mouse sensitivity settings in the options menuIncreased the number of attempts before the alarm triggers (6 attempts instead of 3)General improvements aimed at better performance, stability, and overall smoothnessDefault movement keys are now WASD by default (keys can still be customizedThis update focuses on improving player comfort without changing the core intent or difficulty of the game.Thank you again for your support your feedback truly matters ❤️ Good luck… and listen carefully to the silent walls.Rudy Hollow Signal Games
- In Silent Walls: Subject 13 is now available. - 12 December 2025
After several months of work, I’m happy (and a little nervous) to finally present this first episode of In Silent Walls.Explore an abandoned hospital, dive into a dark and psychological story, and uncover what happened to Elina… A slow, oppressive narrative horror game where every detail matters.Thank you to everyone who added the game to their wishlist, played the demo, or simply supported the project. Your feedback means a lot for what comes next.🩸 Good luck… and thank you for entering the silent walls.
- Official Release: December 12 - 11 December 2025
In Silent Walls: SUBJECT 13 launches on December 12th.The doors of the Red Hollow Sanatorium will finally open. After months of development, In Silent Walls: Subject 13 arrives on Steam with a deeply psychological, oppressive atmosphere where every sound and shadow matters.You play as Kris, returning 20 years later to uncover what truly happened to his sister Elina… But some truths were never meant to be found.- Headphones strongly recommended. - Play in the dark. - And remember… shadows aren't always empty. Key FeaturesA tense, oppressive soundscape crafted to unsettle you.A heavy psychological narrative, revealing piece by piece the decay of Elina… and of the sanatorium itself.Audios, documents, and encounters expanding the mystery of the Subject 13 project.Official Release: December 12Add it to your wishlist and get ready — Soon, you won't be alone in the corridors anymore.Thank you…
- A faint signal still echoes through the walls… - 5 November 2025
More than 800 players have stepped into In Silent Walls: Sujet 13 during the Steam event.❤️Thank you all for playing, sharing your thoughts, and supporting this first solo project. Every message, every video, every word helps shape the final version.The signal is still growing. And it will soon return. 📡
- The Signal grows stronger... - 28 October 2025
In Silent Walls: Sujet 13More than 530 players have already walked through the halls of Red Hollow Sanatorium. Thank you to everyone who took the time to explore, share, and listen to the whispers.Your feedback has been amazing — every comment and every shared scare pushes us to go even further for the full game.This is only the beginning.➤ In Silent Walls: Sujet 13 – Demo available on SteamThe walls listen. The Signal spreads.
- Demo Available ! - 27 October 2025
After months of development, writing and testing, the playable demo of In Silent Walls: Sujet 13 is finally available. Step into the eerie halls of Red Hollow Sanatorium and uncover the first fragments of Kris and Elina’s story.🕯️ What awaits you:A dark psychological atmosphereCollectible documents and story cluesAmbient sounds and realistic lightingA first glimpse into the mystery behind Subject 13🩹 Update 1.0.1 — Exposure Fix: Some users experienced extreme brightness on certain PCs. This issue has been fixed — the demo now runs properly on all configurations.Thank you all for your incredible support, wishlist adds, and early feedback. Every signal counts.
- The demo of In Silent Walls: Sujet 13 is in the works… - 17 September 2025
Hello everyone,I’m very happy to announce that the playable demo of In Silent Walls: Sujet 13 is almost ready! ːsteamhappyːIt will offer a 10–15 minute experience, specially designed to immerse you in the atmosphere of the Red Hollow Sanatorium. What’s waiting for you:Just a little more patience, the demo is coming soon Thank you so much for your support, your wishlists, and your encouragement.Don’t forget to add In Silent Walls: Sujet 13 to your wishlist to be notified when the demo is released!
