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Entity Unknown playtest
by Blackbox Interactive
Entity Unknown is a 1–4 player cooperative supernatural horror game about high-pressure paranormal investigation. Search haunted houses, gather evidence, identify the entity, and escape before it hunts you down.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Oct 2, 2026
- Planned release
- Coming soon
- Developer
- Blackbox Interactive
- Platforms
- Windows, macOS
- Players
- Co-op, LAN, Multiplayer, Online co-op, Single-player
- Languages
- English
How to join the Entity Unknown playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the Entity Unknown 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.
New to playtests? How Steam playtests work
How AI is used
Generative AI tools were used to during development to assist with game code, content, and materials. The game contains no live generative AI interactions and does not generate content during gameplay.
The developer's own words, from Steam.
About Entity Unknown
The house is listening.
Entity Unknown is a cooperative supernatural investigation and survival-
horror game for 1–4 players.
Enter haunted houses, gather reliable evidence, test the entity’s behavior,
and decide how long you can afford to stay. Every investigation asks the
same dangerous question: leave with what you know, or risk everything for
more?
Investigate together
Bring your friends into a Steam party and search each case as a team. Split
up to cover more ground, stay together for safety, or use sound and movement
to lure out activity. When someone is downed, the rest of the team must
decide whether to rescue them or get out.
Read the evidence
Use investigative tools to detect supernatural activity and record your
observations in the journal. Evidence is consistent, but silence is never
proof of safety. Compare clues, test competing theories, and identify the
entity before the house turns against you.
Every entity behaves differently
The entity is controlled locally by the game and reacts within the rules of
the investigation. It can roam, create disturbances, investigate noise,
pursue exposed players, and begin a hunt when the danger rises. Learn what
you are facing by watching what it does—not by waiting for a scripted
answer.
Choose your risk
Carry investigative tools, protective items, and limited supplies into each
case. Manage your equipment, keep an eye on your team, and decide when to
retreat. You can leave without solving the case, but anyone left behind may
pay the price.
Survive the hunt
When the hunt begins, lights, hiding places, sound, and distance all matter.
Break line of sight, stay quiet, and help your teammates when you can. The
safest plan is rarely the most complete one.
Explore changing cases
Investigate small, medium, and large house layouts assembled from authored
spaces and furnishings. Each case gives your team a new place to search, new
routes to learn, and new opportunities for the entity to find you.
Features
- 1–4 player cooperative supernatural horror
- Steam parties and online multiplayer
- Evidence-based entity identification
- Locally simulated entity behavior
- Investigative tools and protective equipment
- Procedurally assembled house cases
- Hunts, hiding, rescue, and extraction
- Top-down pixel-art presentation
- Solo play using the same core rules as multiplayer
From the game's Steam page.
