999: Nine Hours, Nine Persons, Nine Doors is a DS room escape/ visual novel game from Chunsoft. .The game has 9 people trapped on a boat for the Nonary game and they have to find a door marked with a 9 to which escape through within nine hours before the ship sinks. It is the first game in the Zero Escape series In 2012, it's sequel Zero Escape: Virtue's Last Reward was released for 3DS.