In addition to letting teammates solve puzzles through the LOST game, we have created a role-playing deduction game. Players will take on the role of their characters in the script and start investigating other players in order to solve a mystery or hide the truth. On the one hand, we must look for clues in the room to solve the riddle, on the other hand, we must dig out evidence and find the truth about other players. In the course of the game, different characters need to communicate with each other in order to find out who is the real mastermind. The ending is often unexpected. It is a very brain-stimulating intellectual exercise, and it is also a great social event that is very suitable for everyone to play.