Word Unknown is a free, open-source word game from the creator of Synonymy that takes inspiration from hangman and mastermind. Your objective is to guess a random word in as few moves as possible using both lexical and deductive logic. Once a legal guess is made, you'll get X's and O's in response. Each X represents a correct letter in the correct position, and each O represents a correct letter in the wrong position. Daily challenges are available to test your skills against others, and several difficulty settings make the game incredibly difficult to master.