One Key: Card 901

One Key: Card 901 supports 2–6 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.

The listed playing time for One Key: Card 901 is 20 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.

The catalogue lists One Key: Card 901 for ages 8 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.

One Key: Card 901 belongs to these categories: Card Game, Party Game, and Deduction. Its main mechanics are Cooperative Game, Betting and Bluffing, and Pattern Recognition. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.

The credited designers of One Key: Card 901 are: L'Atelier. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.

The catalogue lists One Key: Card 901 as an expansion for One Key. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need One Key to use it. Check that your edition of One Key is compatible, as some expansions were revised between editions.