Zero Time Dilemma

Zero Time Dilemma, also known as Zero Escape: Zero Time Dilemma, is an adventure video game developed by Chime, and published by Spike Chunsoft and Aksys Games. It is the third entry in the Zero Escape series, following Nine Hours, Nine Persons, Nine Doors (2009) and Virtue's Last Reward (2012). The game was released for Nintendo 3DS, PlayStation Vita, and Microsoft Windows in 2016, for PlayStation 4 in 2017, and for Xbox One in 2022.

The story is set between the previous two games, and follows nine people who are kidnapped by a masked person known as Zero. They are divided into three teams, and forced to play a death game called the "Decision Game". The player takes the roles of three of the characters, and plays through the chapters the story is made up of: these consist of animated cinematics, escape-the-room puzzles, and moral decisions for the player to make. The chapters represent 90-minute periods, and can be played out of order.

The game was directed and written by series creator Kotaro Uchikoshi, and features music by Shinji Hosoe and character designs by Rui Tomono. Uchikoshi had started planning the game's story in 2012, but the development was put on hiatus due to the commercial failure of the series in Japan. In 2015, development was announced to have resumed in response to high demand from the series' fan base. The game was positively received by critics.

Zero Time Dilemma is an adventure game consisting of multiple chapters, representing 90-minute periods; chapters consist of narrative sections and escape-the-room puzzle sections. The chapters, referred to as "fragments", are chosen through the Floating Fragment system, in which the player gets to choose a fragment to play based on an image and a vague description. The fragments can be played out of order; the characters lose their memory after each 90-minute period, and do not know where they are in the timeline. When the player completes a fragment, they are returned to the Floating Fragment screen, and the completed fragment is placed in a narrative flowchart, indicating where it takes place in the story.

Narrative sections are presented as three-dimensional animated cinematics, with camera movements and full voice acting in Japanese and English. The Escape sections, which include thirteen different rooms, involve the player searching the room for tools and clues through a point-and-click interface in a first-person perspective and solving puzzles. The puzzles are mostly self-contained, and test the player's problem-solving skills and memory; among these are puzzles where the player has to decipher messages, and ones where they have to align the sides of a three-dimensional object correctly.

After completing an Escape section, the player needs to take a stance in a moral decision; one such decision involves one character being locked into a chair with a gun next to it and another character inside an incinerator. To stop the incinerator, the player needs to choose to pull the trigger, which has a 50% possibility of firing a live bullet, killing the character in the chair. The way the decisions are made varies: some involve choosing between options, and some have the player input their own answer.

Zero Time Dilemma is set between the events of Nine Hours, Nine Persons, Nine Doors and Virtue's Last Reward. The game follows nine characters who have been locked up in an underground nuclear bomb shelter and are forced to play a death game called the Decision Game, which is led by a masked person known as Zero. The shelter is divided into three wards, with three people placed in each section, making up three teams: C-Team, Q-Team, and D-Team. To get to the central elevator hall and escape, the characters need six passwords; one password is revealed each time one of them dies. The characters are all wearing watches that inject them with a drug every 90 minutes, inducing memory loss. Heavily involved in the game's lore is the many-worlds theory, where every decision made creates alternate universes where the opposite was chosen; these timelines make up the game's multiple routes.

C-Team includes Carlos, a firefighter with a strong sense of justice; Akane, a member of a secret society working for a peaceful future, and who pretends to be a "neat and clean, ideal Japanese woman"; and Junpei, a childhood friend of Akane's, who has joined a detective agency to find her after she has not been heard from. Q-Team includes a naive amnesiac boy wearing a spherical helmet; Eric, an ice cream shop clerk who easily cracks under pressure; and Mira, who does not show much emotion and is in a relationship with Eric. D-Team includes Diana, a pacifist nurse who dislikes fighting; Phi, an intelligent woman who participated in the Dcom (Dwelling for Experimental Cohabitation of Mars) experiment together with Akane and Sigma to save the world from the Radical-6 virus; and Sigma, a 67-year-old man in the body of a 22-year-old. Additionally, there is a dog named Gab who is able to pass through vents between the sections to deliver messages between the teams.