Clue is a popular board game created in the 1930s by Parker Brothers. It features six characters including Professor Plum, who is a scientist and inventor. Players must use logic and deduction to determine which character committed a murder in a mansion. The game is played by two to six players and can take up to three hours to complete. CLUE is a popular board game created in the 1930s by Parker Brothers. It features six characters including Professor Plum, who is a scientist and inventor. Players must use logic and deduction to solve the mystery of who committed a murder in a mansion. The game is played by two to six players and can take up to three hours to complete. Professor Plum is one of the characters featured in the game, and players must use their skills of deduction to determine if he is the murderer.