"Fallen London" is a browser game. This means people play it in their web browser, rather than downloading it on their computer or buying it from a store. In 2009, browser games were very popular. Many people played them on Facebook. In 2020, in a quote from his book "Sex, Lies, and Videogames" (which was not yet published), Kennedy said the game was meant to be a different kind of game like them. He wanted to do something different, but still be a browser game.