: Digital keys are often available through Humble Store , Fanatical , and Green Man Gaming .
The "House of Horror" expansion introduces a large map featuring a haunted house and its surrounding grounds, complete with new mechanics and "Easter eggs": Viscera Cleanup Detail on Steam
You can download the expansion from the following major digital retailers:
: The DLC is available for both Windows and Mac platforms. Gameplay Features & Challenges
: Purchase directly from Steam for $2.99 . Note that you must own the base game to play this DLC.