Nine Hours, Nine Persons, Nine DoorsÂ is anÂ adventure video gameÂ developed byÂ Chunsoft. It is the first installment in theÂ Zero EscapeÂ series, and was released in Japan in 2009 and in North America in 2010 for theÂ Nintendo DS. The story follows Junpei, a college student who is abducted along with eight other people and forced to play the "Nonary Game," which puts its participants in a life-or-death situation, to escape from a sinking cruise liner. The gameplay alternates between two types of sections: Escape sections, where the player completes puzzles inÂ escape-the-roomÂ scenarios; and Novel sections, where the player reads the game's narrative and makes decisions that influence the story toward one of six different endings. Development of the game began after Uchikoshi joined Chunsoft to write a visual novel for them that could reach a wider audience; Uchikoshi suggested adding puzzle elements that are integrated with the game's story. The inspiration for the story was the question of where inspiration comes from; while researching it, Uchikoshi came acrossÂ Rupert Sheldrake's morphic resonance hypothesis, which became the main focus of the game'sÂ science fictionÂ elements. The music was composed byÂ Shinji Hosoe, while the characters were designed byÂ Kinu Nishimura. TheÂ localizationÂ was handled byÂ Aksys Games; they worked by the philosophy of keeping true to the spirit of the original Japanese version, aiming for natural-sounding English rather than following the original's exact wording. Nine Hours, Nine Persons, Nine DoorsÂ was positively received, with reviewers praising the story, writing and puzzles, but criticizing the game's tone and how the player is required to re-do the puzzles every time they play through the game (which is necessary in order to obtain the true ending). in order to view. While the Japanese release was a commercial failure, the game sold better than expected for the genre in the United States. AlthoughÂ Nine Hours, Nine Persons, Nine DoorsÂ was developed as a stand-alone title, its unexpected critical success in North America prompted the continuation of the series. The sequel,Â Zero Escape: Virtue's Last Reward, was released in 2012, which was followed byÂ Zero Time Dilemma, released in 2016. An updated version ofÂ Nine Hours, Nine Persons, Nine Doors, with voice acting and higher resolution graphics, was released alongside a port ofÂ Virtue's Last RewardÂ in the 2017 bundle,Â Zero Escape: The Nonary Games. This bundle was released onÂ Steam, theÂ PlayStation Vita, and theÂ PlayStation 4. Nine Hours, Nine Persons, Nine DoorsÂ is anÂ adventure gameÂ in which the player assumes the role of a college student named Junpei.Â TheÂ gameplayÂ is divided into two types of sections: Novel and Escape. In the Novel sections, the player progresses through the storyline and converses withÂ non-playable charactersÂ throughÂ visual novelÂ segments.These sections require little interaction from the player as they are spent reading the text that appears on the screen, which represents either dialogue between the various characters or Junpei's thoughts.During Novel sections, the player will sometimes be presented with decision options that affect the course of the game.The player's decisions result in one of sixÂ branching storylines, each with a unique ending.Â The whole plot is not revealed in just one playthrough; the player needs to reach the "true" ending to get all the information behind the mystery.Â To reach this ending, the player needs to reach one specific ending beforehand.Some of the endings contain hints to how to reach further endings. In between Novel sections are Escape sections, which occur when the player finds themselves in a room from which they need to find the means of escape.Â These are presented from aÂ first-person perspective, with the player being able to move between different pre-determined positions in each room.Â To escape, the player is tasked with finding various items and solving puzzles, reminiscent ofÂ escape-the-roomÂ games.At some points, the player may need to combine objects with each other to create the necessary tool to complete a puzzle.The puzzles include variousÂ brain teasers, such asÂ baccaratÂ andÂ magic squares.An in-game calculator is provided for math-related problems,and the player can ask characters for hints if they find an Escape room too difficult.All Escape sections are self-contained, with all items required to solve the puzzles being available within that section; items are not carried over between Escape sections.After finishing an Escape section, it becomes available to replay from the game's main menu.