From the Press Release
Despite our best efforts, several of you unfortunate souls have gotten a brief glimpse of the terror awaiting you when Knock Knock launches, and now that time is upon us. Today, you can find the game available for purchase on Steam. No doubt your audience is clamoring for the opportunity to horrify themselves into mindless terror, so perhaps you could be of service warning them of what they are about to experience.
For more information on the game, please visit http://knock.ice-pick.com/index.html
Backstory
In November of 2011, Ice-Pick Lodge recieved an anonymous email suggesting they produce a game based on files attached to the message. Everyone gets these "I HAVE A GREAT IDEA FOR A GAME" emails, but this one was a little different.
The attachment was an archive containing 19 files titled "lestplay" including snippets of text, scraps of an audio recording, and fragments of video footage, all with a very oddly-worded message written in a disturbing style. Ice-Pick Lodge was unsettled. Something sinister seemed to be lurking beneath the surface.
The stranger begged them to complete the project he'd started, but also let them know that while it may explain the calamity that befell whoever compiled the ominous archive, the same fate might befall them. Yet he offered creative freedom and clearly believed in what he was saying.
While the team was fed up with mysterious emails with great new ideas, they still decided to give it a whirl and see what would come of it because this, at least, wasn't the 10,000th great new MMO idea, and there was always the chance of tempting fate itself since they'd be the first people to play the game.