In the latest edition of Witness, four players collaborate as members of the secret "Witness Service" to fight crime and solve mysteries! In this cooperative game with 8 connected cases, players first read an introductory prologue and then take separate sets of clues to study and memorize.

A case unfolds over four rounds, where a pair of players will be guided to whisper the facts they know to a specific person, excluding any details they have learned from previous rounds. After keeping everything concentrated in their memory for four rounds, players will have the opportunity to write notes about what they can remember before secretly answering three questions about the case. The team's final score is the total of all correct answers, with a maximum of 12.

Witness is filled with tension and laughter as the best agents of the Witness Service try to keep their facts in order while chasing the truth.

The Treasure of Othesis includes an adventure with 8 individual cases woven into an overarching story: A famous archaeologist is murdered. In his safe, players find clues to the priceless treasure of Othesis, buried deep in a lost temple. In their journey through the deserts of Egypt, players encounter a gang of criminals – led by their eternal rival, "The Chameleon"...