Brickworks Games and HypeTrain Digital extend the open playtest for the first-person psychological adventure following strong player interest and ahead of the Point and Click Steam Showcase.
October 26, 2026 | HypeTrain Digital and Brickworks Games are extending the open playtest for Sublustrum, a first-person psychological narrative adventure about mystery, memory, and sound. The playtest will now remain available through November 9.
The extension follows strong interest from players and gives more registered playtesters – including those who have not yet had a chance to try the build – additional time to participate. Sublustrum is also taking part in the Point and Click Steam Showcase, running November 2–9, and the team expects the event to bring new players to the game.
Players can join the playtest through the game’s Steam page and play Chapter One, the opening section of Sublustrum. The team invites players to share feedback as development continues.
The playtest covers the opening chapter of the game and offers a first look at how Sublustrum plays. Players will explore its opening locations, start following the trail left by the protagonist’s brother, and encounter environmental puzzles where paying attention – especially to sound – is key.
In Sublustrum, you arrive at the home of your missing brother and find the machine he had been working on: a device built to immerse a person in the depths of the subconscious. Once restored, it becomes a gateway to the Flickering World, a surreal place shaped by memory and governed by rules you’ll have to uncover for yourself.
- A mystery that pulls you deeper: Follow the trail left by your missing brother and uncover what happened to him – and what lies beyond his final experiment.
- Listen closely: Sound is part of the gameplay. Tune frequencies, follow voices, pick up audio clues, and use what you hear to solve puzzles.
- Explore the Flickering World: Travel through surreal spaces shaped by memories, intricate machinery, and dreamlike environments where reality doesn’t always work as expected.
- Puzzles built into the world: Observe your surroundings, experiment with strange devices, and piece together solutions that feel like part of the story rather than standalone challenges.
- A classic reimagined: The original 2008 Sublustrum returns as a fully explorable 3D adventure, rebuilt from the ground up by members of the original team.
Quick Links
Sublustrum – Steam page
Official Playtest Trailer
About Brickworks Games
Brickworks Games is an independent game studio based in Limassol, Cyprus, founded by Georgy Beloglazov, creator of Sublustrum and Phobos: 1953, and the composer behind the music project Anthesteria. Brickworks Games is best known for mobile titles Grim Soul and Cyberika, with its games reaching more than 65 million downloads worldwide. Now, Beloglazov and his studio are returning to PC development with a complete reimagining of Sublustrum – the game that started it all.
About HypeTrain Digital
HypeTrain Digital is an indie game publisher helping developers bring their visions to life on PC and consoles worldwide.