Just One
Give unique one-word clues to help a teammate guess a mystery word—but identical clues cancel before the guess is made.
One player tries to guess a mystery word while everyone else secretly writes a one-word clue.
Before the guess, duplicate clues are removed. The guesser only sees the surviving unique clues, so useful answers have to be both relevant and distinctive.
Why We Love It
Just One creates its puzzle through cancellation. Obvious clues feel safe, but if two players choose the same word both clues disappear, so the group has to predict one another as well as help the guesser.
About Just One
One player tries to guess a mystery word while everyone else secretly writes a one-word clue.
Before the guess, duplicate clues are removed. The guesser only sees the surviving unique clues, so useful answers have to be both relevant and distinctive.
Game at a Glance
See the Mystery Word
Everyone except the guesser knows the target.
Write One Clue
Each helper secretly gives a single-word hint.
Cancel Duplicates
Matching clues disappear before the guesser can see them.
Make One Guess
Use the remaining unique clues to identify the target word.
What is Just One?
Just One is a cooperative party game by Ludovic Roudy and Bruno Sautter for 3–7 players. Everyone works together to help the active player identify a mystery word.
Repos Production’s current version contains 550 new words and is listed at about 20 minutes.
How the game works
The active player chooses a numbered mystery word without seeing it. Every other player writes one one-word clue in secret.
Before the guesser sees the clues, all duplicate clues are removed. The remaining unique clues are revealed, and the active player gets one chance to guess the word.
The decisions that define it
The best clue is not simply the most obvious clue. If several players are likely to write the same word, an otherwise perfect clue can disappear completely.
Players therefore balance clarity against uniqueness, trying to predict both the guesser and the other clue writers.
Who is it for?
Choose Just One if you want a fast cooperative party game with almost no downtime and rules that fit mixed-experience groups.
Choose Codenames if you want teams, repeated clue-giving pressure and a more competitive structure.
Learn Just One in depth
Publisher sources & scope
Checked September 16, 2026. This hub covers Repos Production’s current Just One version with 550 new words.