 The story follows the player character Sigma , a man who is abducted and forced along with eight other individuals to play the Nonary Game , which puts its participants in a life @-@ or @-@ death situation . As the story progresses , the characters begin to unravel the secrets behind the Nonary Game , as well as its true purpose . The gameplay alternates between two types of sections : Escape sections , where the player completes puzzles in escape @-@ the @-@ room scenarios ; and Novel sections , where the player reads the game 's narrative and makes decisions that influence the story , making it branch into twenty @-@ four different endings . 
