Compare Mysterium prices across trusted key stores and find the best deal. Developed by Twin Sails Interactive. Published by Asmodee Digital. Released on 1/12/2017. Available on PC. Genres: Strategy.

A digital adaptation of the co-op board game where one player haunts, the rest deduce. Ghost sends vision cards; psychics argue about what they mean.

Mysterium is a cooperative deduction game adapted from the popular board game of the same name, set in a 1920s manor with a murder mystery at its heart. One player takes the role of the ghost, silently communicating through abstract "vision" cards, while the remaining players act as psychics trying to interpret those images and identify the correct suspect, weapon, and location. No ghost player can speak. All communication runs through surreal, dreamlike card imagery. If that setup sounds like it belongs at a dinner-party table rather than a Steam library, you are not wrong, and that tension between physical and digital is the central thing you need to think about before buying. As a strategy and deduction experience, the depth here is genuinely interesting. The ghost player makes meaningful card-selection decisions every round, and over repeated plays you start to build a mental library of which images telegraph which associations most reliably. There is a real skill curve to ghost-side play that casual descriptions of the game tend to undersell. On the psychic side, the group vote mechanic and the final shared-deduction phase both reward players who track the table's reasoning rather than just their own intuitions. The AI psychics exist to fill empty seats, but their interpretation logic is shallow enough that you will notice immediately. This is a game that wants human disagreement at the table. The digital implementation handles the basics competently. Card art from the board game translates well to a screen, the interface is clean, and async online play is supported, which is the correct answer for a game whose sessions can stretch depending on player count and deliberation time. Where Twin Sails stumbles is in the surrounding infrastructure. Matchmaking is sparse, the tutorial covers rules but does not coach the ghost role's strategic thinking, and the game launched in 2017 with a community that has since thinned considerably. Finding a random online lobby is unreliable. This is now functionally a "play with friends" product, not a "find a game" product. From a pure content standpoint, the base game includes the core suspect, weapon, and location decks, with expansions adding additional cards and scenarios. If you own the board game, the digital version adds convenience but not much novelty. If you have never played the board game, this is a low-friction way to learn the rules before committing to a physical copy. Mod support is minimal and the community around custom content is small. For a strategy-minded player expecting the kind of long-tail replayability that comes from a deep ruleset or emergent systems, Mysterium will feel light after ten to fifteen sessions. The mixed review score on Steam reflects a real split: players who came in expecting a robust online community got burned by thin matchmaking, while those who brought their own group consistently report enjoying it. If you have three or four people who can reliably show up for an online session, the experience holds up. Solo play against AI is a poor substitute. Treat this as digital board-game night infrastructure, not a standalone PC game with its own identity, and your expectations will land correctly. Diego, Scout Team

Mysterium

Mysterium

Jan 12, 2017Twin Sails InteractiveAsmodee Digital
GamerScout Says

A digital adaptation of the co-op board game where one player haunts, the rest deduce. Ghost sends vision cards; psychics argue about what they mean.

PC
Steam Deck VerifiedProtonDB Platinum
Best Price Available
€1.46-79%
at Steam
Lowest tracked: €1.46
Track this price

GamerScout Verdict

Worth it only if you have a consistent group of friends to play with - solo and random matchmaking modes disappoint.

Compare Prices(6 stores)

SteamBest price
StandardEurope (EU)Steam KeyKey
€1.46-79%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€1.59
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€2.12-70%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyGift copy
€2.26-16%
Priced in EUR by the store
Buy
StandardGlobalSteam KeyKey
€2.68
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€3.53
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€3.70
Priced in EUR by the store
Buy
StandardEurope (EU)Steam KeyKey
€4.49-36%
Priced in EUR by the store
Buy

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Price History

Lowest tracked
€1.4629 Aug 2026
Current best
€1.46
Lowest since we started tracking
Official storesKeyshops
€1.37€1.68€2.00€2.315 Jun28 Jun22 Jul14 Aug6 Sept
5 Jun — 6 Sept
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Screenshots & Media

About Mysterium

Mysterium is a cooperative deduction game adapted from the popular board game of the same name, set in a 1920s manor with a murder mystery at its heart. One player takes the role of the ghost, silently communicating through abstract "vision" cards, while the remaining players act as psychics trying to interpret those images and identify the correct suspect, weapon, and location. No ghost player can speak. All communication runs through surreal, dreamlike card imagery. If that setup sounds like it belongs at a dinner-party table rather than a Steam library, you are not wrong, and that tension between physical and digital is the central thing you need to think about before buying. As a strategy and deduction experience, the depth here is genuinely interesting. The ghost player makes meaningful card-selection decisions every round, and over repeated plays you start to build a mental library of which images telegraph which associations most reliably. There is a real skill curve to ghost-side play that casual descriptions of the game tend to undersell. On the psychic side, the group vote mechanic and the final shared-deduction phase both reward players who track the table's reasoning rather than just their own intuitions. The AI psychics exist to fill empty seats, but their interpretation logic is shallow enough that you will notice immediately. This is a game that wants human disagreement at the table. The digital implementation handles the basics competently. Card art from the board game translates well to a screen, the interface is clean, and async online play is supported, which is the correct answer for a game whose sessions can stretch depending on player count and deliberation time. Where Twin Sails stumbles is in the surrounding infrastructure. Matchmaking is sparse, the tutorial covers rules but does not coach the ghost role's strategic thinking, and the game launched in 2017 with a community that has since thinned considerably. Finding a random online lobby is unreliable. This is now functionally a "play with friends" product, not a "find a game" product. From a pure content standpoint, the base game includes the core suspect, weapon, and location decks, with expansions adding additional cards and scenarios. If you own the board game, the digital version adds convenience but not much novelty. If you have never played the board game, this is a low-friction way to learn the rules before committing to a physical copy. Mod support is minimal and the community around custom content is small. For a strategy-minded player expecting the kind of long-tail replayability that comes from a deep ruleset or emergent systems, Mysterium will feel light after ten to fifteen sessions. The mixed review score on Steam reflects a real split: players who came in expecting a robust online community got burned by thin matchmaking, while those who brought their own group consistently report enjoying it. If you have three or four people who can reliably show up for an online session, the experience holds up. Solo play against AI is a poor substitute. Treat this as digital board-game night infrastructure, not a standalone PC game with its own identity, and your expectations will land correctly.

Diego
Diego · Scout Team

Strategy & simulation

Tags

steamCooperative DeductionAsync MultiplayerBoard Game AdaptationGhost RoleHidden InformationParty Strategy1920s Setting

System Requirements

Minimum

Processor
2 ghz processor single core
Memory
2 GB RAM
Graphics
Intel HD Graphics 3000

Recommended

Processor
2 ghz processor dual core
Memory
4 GB RAM
Graphics
Intel HD Graphics 4000

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Reviews & Ratings

Steam
75%(906)

Game Info

Developer
Twin Sails Interactive
Publisher
Asmodee Digital
Release Date
Jan 12, 2017

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Frequently asked questions about Mysterium

How much does Mysterium cost?

As of 6 September 2026, the cheapest in-stock offer for Mysterium is €1.46 at Steam, out of 8 live offers we track across verified key stores. Prices change daily — the table on this page is refreshed continuously.

Where can I buy Mysterium cheapest?

The lowest in-stock price we track for Mysterium is €1.46 at Steam (6 September 2026). We compare 8 live offers from verified key stores — the full table with every store and its trust score is on this page.

What platforms is Mysterium available on?

Mysterium is available on PC.

When was Mysterium released?

Mysterium was released on 12 January 2017.

Who developed Mysterium?

Mysterium was developed by Twin Sails Interactive and published by Asmodee Digital.