999: Nine Hours, Nine Persons, Nine Doors

999: Nine Hours, Nine Persons, Nine Doors (Kyokugen Dasshutsu Ku Jikan Ku Nin Kyū no Tobira in Japan, lit. "Extreme Escape: 9 Hours, 9 Persons, 9 Doors") is a graphic adventure game releases on the Nintendo DS in Japan on December 10, 2009, and in North America on November 16, 2010. It has not been released in any other regions.

Nine people have been abducted by the masked man who calls himself “Zero.” They have nine hours to escape a sinking ship by heading through the nine doors, each numbered 1 through 9, in hopes of finding door 9, the alleged way out.

This is a text-heavy game, and more emphasis is placed on the plot, characters, and dialogue than on the gameplay, which consists of solving puzzles in order to unlock the door and proceed. In addition, the choices the player makes can lead to any of the six endings, only one of which is the “true” ending.