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Project Parasite playtest
by Kol1bri Studio
A social co-op game with hidden roles for 6–11 players. Work together, negotiate and choose your ship's course. Three secret factions share the table, but only one can win. At night, a parasite can turn an ally against you.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Oct 31, 2026
- Planned release
- Coming soon
- Developer
- Kol1bri Studio
- Platforms
- Windows
- Players
- LAN, Multiplayer, PvP
- Languages
- English, French, German, Polish and 6 more
How to join the Project Parasite playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the Project Parasite 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 was used during development to create selected illustrations and interface artwork, store graphics, and prerecorded narration and audio for promotional videos. These assets are prepared in advance. The game does not generate AI content during gameplay or connect to a third-party generative AI service.
The developer's own words, from Steam.
About Project Parasite
Work together. Hide your role. Choose who to trust.
Project Parasite is a social co-op game of bluffing and deduction, with hidden roles and navigation cards for 6–11 players. Gather around a spaceship's circular table: talk, bluff and work together to choose a course. Every crew member secretly belongs to the Alliance, the Resistance or the Parasites. You share the ship, but each faction has its own goals. Only one faction wins each match.
Choose your officers. Question their story.
The captain appoints a first mate and a navigator. The captain and first mate each draw two cards and pass one along. The navigator chooses between the two shuffled cards without knowing who supplied each one. Discuss what happened before the captain launches the ship. Was that course bad luck—or betrayal?
Fight for command
Don't trust the captain? Commit your pistols to a mutiny and try to change the command. Contributions stay hidden until the mutiny ends. Spend your resources now, or save them for the next struggle.
Yesterday's ally may change overnight
Taking the straight course triggers a night phase. While the crew sleeps, Zero Parasite can infect another crew member and bring them onto the Parasites' side. Nighttime communication follows the game's privacy rules. When everyone wakes, yesterday's promises may mean something very different.
Use the route to your advantage
Scanners reveal a chosen player's faction privately to the captain. Interrogation gives the crew partial information, while the airlock can remove someone from active play. Each special hex can change the balance of trust—and the ship's destination.
Find your place at the table
Choose your suit colour and express yourself with character gestures. Personal terminals keep decisions private; the shared board and results display show what the crew is allowed to know. Learn the basics in the interactive tutorial, then gather your crew for a match.
Features
- 6–11 players and three secret factions; only one faction wins.
- Navigation cards, a hex board and three officers who influence the course.
- Mutinies with secret pistol contributions and changes of command.
- Nighttime infection that can change a player's faction.
- Scanners, interrogation and airlock decisions with consequences.
- Voice chat, private terminals, suit colours and character gestures.
- An interactive tutorial to introduce the rules.
From the game's Steam page.
