A Fleeting Case of Self-Possession, or, Memento Moratori is a work of parsered interactive fiction that won third place in the 2010 IntroComp, a competition for short introductions to ostensible longer works of interactive fiction. More information can be found at its IFWiki page, or you can read a pair of charming tweets from an internet stranger here and here.
Memento Moratori was written in Inform 7. You can download its zcode file (playable on any interpreter with Blorb support) here, or play it online via the Parchment interpreter here.