I Know...You Don't Card Game

★ 4.6 · 221 ratings

$9.97

Listed by our retail partner when we last looked. The live page has the final word.

3-7 playersage 10+about 10 minutesspeed matching

We designed this deck around hidden patterns and quiet observation. One player holds the secret rule, while the rest of the table plays cards to figure out what fits and what fails. A single round takes about 10 minutes, with players testing theories on every turn.

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How to play, step by step

The hidden ruleEach round centers on an unstated pattern. Players learn the criteria card by card as plays are confirmed or rejected by whoever holds the secret.

Actions on your turnOn your turn, you can test a single card, try playing multiple cards together, or trade in your entire hand to search for better clues.

Table size and ageThe box is marked for ages 10 and up. It supports groups of 3 to 7 players, making it easy to pass around a table or run across a classroom desk.

Five difficulty levelsThe deck includes five distinct difficulty tiers for the secret rules, moving from direct visual traits to complex multi-step conditions.