Portal Games: Saw

You have been kidnapped and have lost your senses. When you wake up, you see yourself chained in a dark room. There is a video of Billy on TV in front of you, and he tells you that you must play a game with him in order to survive. Whether you want to or not, you have to play the game. You have no other choice. You must either free yourself from the chains within the hour and leave the room, or you will fall prey to them. The game is on!