1. Choose a friend to play with Or join their game with a code they gave you.

2. Take turns adding letters A word starts with one random letter then players take turns adding a letter to either the start or end of the word fragment. The goal is to be the last player to add a letter that can still make a valid word.

3. Call Bluff! ...or keep building If you don't think there's a word containing the current letters from the other player's turn, call Bluff! Otherwise, keep adding letters.

4. Prove your word If someone calls Bluff! you must provide a valid word containing the word fragment. If it's a valid word in our dictionary, the definition will be shown to the other player for judging.

5. Own the Bluff! If you didn't make a valid word, don't worry, you can still score! You just need to make up a definition for your newly made-up word and see if the other player falls for it.

6. Judge the word The other player sees your word and definition and decides if it's real or if they think you made it up.

7. Score points Win points by successfully building words, bluffing, or by correctly calling out a bluff!