One Key Essentials:

• No. of players: 2 - 6
• Playing time: 20 minutes
• Age: 8

One Key - Rules of Play says:

The Key is missing, and it is up to the players to find it! The team leader tries to communicate with the other players, proposing clues by indicating their degree of affinity — strong medium/weak — with the object that the team must find. With good team-play, the other players remove the wrong cards, step by step, until the Key is all that remains. Removing the Key results in instant defeat, so be careful!