Photopia is a piece of literature by Adam Cadre rendered in the form of interactive fiction, and written in Inform.

[2] Photopia has few puzzles and a linear structure,[3] allowing the player no way to alter the eventual conclusion but maintaining the illusion of non-linearity.

Adam Cadre has stated that Photopia was heavily influenced by The Sweet Hereafter, a film that prominently features a babysitter and a bus crash.

Years later, he dropped the pretense that there was a real "Opal O'Donnell" who had submitted Photopia for him, stating: "it started to bother me that v1.0 of the Phaq had lies in it.

"[5] In 2012, while reviewing Winter Lake's Rat Chaos, Short hyperlinked Photopia as a game that "plays with agency not in the usual ways [...] discovering you have none.