The game is unique amongst adult titles in the sense that your actions (whether moral, or amoral) dictate the gameplay and story direction heavily, and for the rest of that game/session. You start the game walking in the door of a House Party already in progress, and your goal is to try to play out to a variety of endings by completing various puzzles and social interactions with the characters. House Party, in its concept and sense of humor, is a throwback to the adventure style games of the 80s and 90s like Leisure Suit Larry and Monkey Island, but it is rendered in a beautiful full-3D first-person context.