The Stanley Parable is an interactive fiction video game designed by Davey Wreden. The game was originally released on July 27, 2011 as a free modification for Half-Life 2. A high-definition stand-alone remake, including new story elements, was again designed by Davey Wreden together with Source engine modeler William Pugh, under the Galactic Cafe studio name. The remake was announced and approved via Steam Greenlight in 2012, and was released on October 17, 2013 for Microsoft Windows. Later updates of the game added support for OS X on December 19, 2013, and for Linux on September 9, 2015.