Reveralgia 

The sadness and longing experienced by a participant in a mnemonically insulated virtual world for what it must be like to experience the world it exists within; a kind of nostalgia for both wanting mnemonic context and knowing that such context would destroy the virtual existence that longs for it. The disappointment of knowing or believing that there is some other entity that has access to your experience, even if you can never have access to their's.

Akin to the desire for a cell of organism to leave the body it's a part of.

As he thought about the simulation he likely found himself in he experienced profound reveralgia—he knew he would never, and could never, experience what was outside of this place without also being annihilated.

Reveralgia by antiplutocratic December 10, 2024

Retralgia

Definition:
(noun.) A painful longing for an idealised past, often intensified by grief, nostalgia, and/or the intense awareness that it cannot be recovered as idealised.

Etymology:
Coined from retro- (backwards; past) + -algia (pain; distress; longing).

I felt retralgia when I saw an old video of people playing a video game that is now unplayable.

Retralgia by holsan August 15, 2026