Crashword is a co-operative game lovingly based on the board game "Just One".
Each turn, one single player is the guesser trying to guess a secret word; everyone else is a clue-giver.
Each clue-giver submits a one word clue, trying to help the guesser guess the secret word.
All duplicate clues (crashes) are thrown out, and the guesser only sees the clues that were unique.