Fallen London: The Calendar Code (2016)

The Calendar Code is add-on for Fallen London, a browser-based choose-your-own-adventure game set in "Fallen London", an alternative Victorian London with gothic overtones. The Calendar Code was originally published as an Exceptional Story and is the third and final story in the Season of Revolutions.

Storyline

Infiltrate a private library at the behest of a mysterious buyer, and unravel the mechanism that protects its heart. Avoid the ministrations of Special Constables. The Calendar Code is a tale of romance, larceny, and seditious literature.