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Osteomalacia playtest
by Yellow Screen
Osteomalacia is a 2D top-down survival shooter set in a fog-covered city overrun by mutated beasts. Fight to escape by any means, upgrade your gear and skills, and uncover the story as you survive.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Dec 2, 2025
- Planned release
- To be announced
- Developer
- Yellow Screen
- Platforms
- Windows
- Players
- Single-player
- Languages
- English, Russian
How to join the Osteomalacia playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the Osteomalacia playtest signup there. You're in straight away, with nothing to pay.
- The playtest shows up in your Steam library, ready to install and play.
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About Osteomalacia
Osteomalacia is a top-down survival shooter set in a post-apocalyptic city. Your main goal is to find a way out of this nightmare, overrun by mutated people and animals.
An experimental bomb detonated above your city. Instead of burning it down, the explosion shrouded the streets in a thick black fog. You immediately notice the sudden disappearance of the Sun. Stepping outside, you witness every living thing around you mutated and transformed. It didn’t affect you—at least not yet. But soon, surviving will be all that matters.
Now, your only hope is to escape this land of abominations.
\[First step]: Explore randomly generated streets of this city, enter as many buildings as you can, and find whatever left of it previous owners.
\[Second step]: Escape location before the emission or consequences of your noise pollution and return home with all your loot.
\[Third step]: Upgrade your equipment, salvage junk and Improve your skills from the newly earned experience.
\[Fourth step]: Receive a radio signal? Wait, someone else is alive?
\[Final step]: Escape...
Or not...
Huge thanks to Gloronic for cover artwork.
From the game's Steam page.
