The first game in the Zero Escape series, originally made as a standalone title "Nine Hours, Nine Persons, Nine Doors". The Zero Escape rebranding and alternative cover of the game were released around the time of the Sequel "Zero Escape: Virtue's Last Reward". The game is a murder mystery visual novel with a heavy story focus that requires multiple playthroughs to figure out and involves puzzle rooms used to progress through the story with dialogue choices to be made inbetween them.