Long ago in the early 1990's, on a gloomy Halloween night in an old, cursed house, a wicked force began to stir. Foolish mortals dabbled in things they did not understand and could not comprehend. Evil was unleashed. The hapless fools that brought chaos back into the world were slaughtered..
And now it falls to you to set things right. You must wash away the stains of evil. So get your mop ready once more and clean this mess up!
The "House of Horror" DLC features a whole new level set in a haunted suburban home and surrounding grounds, complete with new assets and challenges to discover and overcome.
Source: The Game Website.