
- BGG rank
- BGG #17,867
- BGG rating
- 6.7
Witness: The Sigma Club
- 4 players
- 10–25 min
- Complexity 2.0/5
- 2024

2024
Rules assistance for Witness: On the Trail of the Chameleon
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.
For 4 players

What would you like to know?
Answers come from the official rulebook, with the page to check.
Witness: On the Trail of the Chameleon is a board game released in 2024 for 4 players, 10–25 minutes per game, and ages 10 and up. It was designed by Dominique Bodin and its main mechanics are Memory, Deduction, and Storytelling.
In the reimplementation of Witness, exactly four people fight crime together as members of the secret "Witness Agency" organization! A prologue introduces the case, after which each team member receives their own secret clues. In the four Whisper rounds, these are passed on to another person - in the direction of the arrow on the Whisper card. In the first round, only their own clues are whispered, from the next round onwards, the clues that the players received in the previous round are also whispered. After the fourth round of whispering, the players secretly answer three questions about the case. Those who have listened carefully and answered the questions correctly receive valuable points when the case is solved. On the Trail of the Chameleon contains an adventure with 8 individual cases woven into an overarching story: A groundbreaking invention in the fight against climate Change has caught the attention of spies and criminals worldwide, all intent on stealing its top-secret blueprints. Players' mission is to thwart their efforts, and follow the trail of the “Chameleon”, their everlasting foe. —description from the publisher
Witness: On the Trail of the Chameleon supports 4 players according to the catalogue. This is the publisher’s listed player count, so the game is designed for exactly that number of participants. Variants for other group sizes, if any, are described in the rulebook of your edition, so check it before setting up a different configuration.
The listed playing time for Witness: On the Trail of the Chameleon is 10–25 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 Witness: On the Trail of the Chameleon for ages 10 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.
Witness: On the Trail of the Chameleon belongs to these categories: Deduction, Murder / Mystery, and Memory. Its main mechanics are Memory, Deduction, and Storytelling. 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 Witness: On the Trail of the Chameleon are: Dominique Bodin. 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 Witness: On the Trail of the Chameleon as a base game. It can be played on its own with the components in the box and does not require any other title. Expansions, if any exist, add new content or rules on top of it and are listed separately in the catalogue with a link back to this base game.