House Party is a risqué mixture of open-ended sandbox, dating sim, and point-and-click adventure game. During the titular house party, you'll be presented with hundreds of different choices and scenarios and you'll have to make decisions about what you want to do. Depending on your choices, you'll encounter a host of different outcomes.
Since this is an adult game, you'll find plenty of stuff with which to make some noise, so to speak. Feel like getting drunk? There's alcohol on hand. Want to change the music? Better go find the MP3 player (that's right, it's not a phone). Naturally, there are also...other choices you can make to cause chaos. The house is your oyster.