ZERO ESCAPE
gameplay
puzzle
The puzzle part is when the player must solve the escape-the-room puzzles that are blocking their way in order to progress through the game. There are 16 escape rooms in total and the order in which the player encounters them depends on their choices during the Chromatic Doors and AB Game. Each escape room has a safe and two passwords for it: an escape password and another password to unlock a secret file.
visual novel
The visual novel part in which the player can talk to the other Nonary Game: Ambidex Edition participants and make decisions that affect the story of the game. Sigma or the other players may die depending on what Chromatic Doors, AB Game choices and dialogue choices the player makes.
extras
The player can enable "auto advance text" mode and simply relax and listen to the voice acting, rather than click through hundreds and thousands of text boxes like in the Nintendo DS version of 999. A new Memo function allows the player to write anything they want such as passwords. A FLOW Chart allows the player to see how alternate choices unfold. Unfortunately, the calculator from 999 does not return, meaning the player should have another calculator during escape rooms.