X-Passes are an important component of the Decision Game. These six passwords are used to open the X-Door, which in turn allow the remaining participants to escape the Underground Shelter via an elevator in the Central Elevator Hall.
X-Passes are only obtained when a Decision Game participant dies - how they are killed doesn't matter, whether it be one of the Decision Games, murder by another participant, or suicide. X-Passes are read aloud by an intercom speaker throughout the facility along with the name(s) of the recently deceased. The X-Passes are also listed on a board by the X-Door so that if someone forgot an X-Pass, they wouldn't need someone to die again -- a generosity from Zero.
X-Passes appear to be character specific and depend upon who killed the person and how they killed them.
X-Passea are not verifiable unless they are obtained from the same timeline as they are entered in. Using X-Passes from another history results in a penalty.
As they are set by Delta, they indicate he is very knowledgeable about the Decision Game participants. He is aware of facts about them from the future and other histories, and even some things that the participants did not know about themselves.
- It is unknown if there is a limit to how many X-Passes could be entered. If there wasn't and someone could enter in as many X-Passes by guessing, then simply inputting numbers would result in two X-Passes (Six and Five). Doing colors would result in two (Red and Blue). Also, if someone guessed an X-Pass and got it right, simply entering the opposite would often yield another X-Pass. For example, if someone guessed Love, then Hate would be another. Rich/Poor, Dad/Mom, Kill/Save are more opposite X-Passes.
- That said, given the penalty imposed upon C team for using passwords learned from another timeline as opposed to passwords derived after deaths in the current timeline, it is likely that guessing would not yield the desired result.
List of X-Passes
|X-Pass||Participant||Method of death||Possible relationship to character|
|Five||Junpei||Execution||His number in 999|
|Eye||Q||Execution||Delta's assumed blindness / His unnatural eyes / His watching the entire facility through the cameras|
|Fool||Eric||Execution||A testament to Eric's personality|
|Blue||Diana||Execution||Color of her bird music box / Her eye color|
|Red||Phi||Execution||Her true hair color|
|Milk||Sigma||Execution||His surname reversed / MILKEVOLI / White liquid on palm in VLR resembled milk / Cat reference (although cats shouldn't drink milk)|
|Self||Q||C-Team Acid Button||Delta being primarily in the point of view of the player (and Zero) / Since Zero chose the codes, Q would be "himself"|
|Rip||Mira||C-Team Acid Button||Heart Ripper|
|Lake||Eric||C-Team Acid Button||Memories of the lake|
|Bird||Diana||C-Team Acid Button||Blue bird music box|
|Twin||Phi||C-Team Acid Button||Phi being a twin|
|Old||Sigma||C-Team Acid Button||Old consciousness|
|Mom||Diana||Q-Team Acid Button||Diana being Zero's mother|
|Dear||Phi||Q-Team Acid Button||Dear to both Sigma and Diana|
|Arm||Sigma||Q-Team Acid Button||Lost arms to a bomb in the timeline leading to VLR|
|Dream||Carlos||Q-Team Acid Button||His sister's Reverie Syndrome|
|Key||Akane||Q-Team Acid Button||Crash Keys|
|Quark||Junpei||Q-Team Acid Button||Companion and adopted grandchild in VLR|
|Shift||Carlos||D-Team Acid Button||His ability|
|Six||Akane||D-Team Acid Button||Her number in 999|
|Ring||Junpei||D-Team Acid Button||He holds one for Akane|
|Age||Q||D-Team Acid Button||Delta's old age|
|Heart||Mira||D-Team Acid Button||Heart Ripper|
|Love||Eric||D-Team Acid Button||In love with Mira|
|Moon||Diana||Gun||Diana = Goddess of the Moon / The moon is also where she died leading to VLR|
|Fate||Sigma||Gun||Fated to cause the Radical-6 outbreak, and to become the father of Delta.|
|Future||Phi||Incineration||Traveled back from 2074 / Knows the future|
|Ice||Eric||Scalpel||Works as an ice cream salesman|
|Poor||Eric||Crossbow||State of his family after his mother died.|
|Bro||Q||Grenade||Delta is Brother, the leader of Free the Soul, and Phi's brother|
|Dad||Sigma||Stabbing||Father of Zero|
|Time||Phi||Stabbing||Traveled back from 2074|
|Hero||Carlos||Carbon Dioxide||Firefighter, sacrificed himself|
|Hex||Akane||Carbon Dioxide||6, her number in 999|
|Save||Carlos||Gatling gun||Firefighter, returns to save Akane and Junpei|
|June||Akane||Axe||Her codename in 999 / Name of her Voodoo doll from Junpei|
|Virgin||Mira||Strangulation||Name of one of her victims (Virginia)|