History Fridge / ZeroTimeDilemma

* Sigma and Diana's rather apathetic response to Q being the only person still alive baring them seems odd. [[spoiler:Although it makes more sense when you consider the fact that the only person still alive is a wheelchair bound old man who can't see, hear or talk.]]
* In C-End 1, you learn that Q is still alive. At the the same time the alagram is revealed as "Together with me, we are ten". By this point you've likely already gotten the D Team End 1, during which "Q" is shown to be [[spoiler:seemingly dead. This indicates that the "Q" spoken off throughout the game doesn't refer to the young boy.]]

** For that matter, being a Shifter is pretty horrific. You're going to be endangered again and again, and there will always be someone who wants to leverage your powers. That's if you're ''lucky''. If you're unlucky, you're the consciousness on the other end of the shift and could, at literally any moment, be abruptly ''yanked out of your body and into one seconds from death''.

* The fact that [[spoiler: the 3 teams are operating at different times]] is foreshadowed during [[spoiler: the Decontamination Room Votes. Rather than being parallel to each-other on the timeline, they happen sequentially.]]

** For that matter, being a Shifter is pretty horrific. You're going to be endangered again and again, and there will always be someone who wants to leverage your powers. That's if you're lucky. If you're lucky, you're the consciousness on the other end of the shift and could, at literally any moment, be abruptly ''yanked out of your body and into one seconds from death''.

* If you didn't figure it out or were at least skeptical before, when the other teams find [[spoiler: Junpei's dismembered body in the pods, it's apparent he's not wearing the same clothes he usually wears. They're the clothes the limbs from the pantry had. Despite what Carlos and Akane were trying to tell themselves, the limbs were real, and they were ''Junpei's''.]]

* When the other teams find [[spoiler: Junpei's dismembered body in the pods, it's apparent he's not wearing the same clothes he usually wears. They're the clothes the limbs from the pantry had. Despite what Carlos and Akane were trying to tell themselves, the limbs were real, and they were ''Junpei's''.]]

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* In the final ending, [[spoiler: removing control for Carlos' final choice implies that every decision across the entire series was Delta taking control for an instant.]]

!!Fridge Brilliance

* The use of the CQD letters, [[spoiler: the former distress signal before SOS became an international standard]] makes a ''whole'' lot of sense when you realize it ties with Zero's ''Snail'' analogy. [[spoiler: One story about the Titanic was that a helmsman used the then-new SOS signal to try and call for help from another, nearby boat but the other ship didn't respond because they didn't realize that SOS was a distress signal, as they still used CQD on their ship. Now, what was the [[VisualNovel/NineHoursNinePersonsNineDoors Gigantic]] a sister ship to?]]

* The new booklet shows the golden ratio being one the scientific motifs in this game. The golden ratio is mathematically represented by the letter Phi in equations.

** X could also mean "10" in Roman numerals, symbolizing the 9 participants plus Zero.

** There's also the fact that the root number of 180 being 9!

* The release date for the game is June 28th, 2016. This is the 180th day of that year, and this in base nine has a least significant digit of zero.