Created by Itch.io developer "corpsepile," The Open House is a horror game that initially pretends to be a simple "open house simulator." A company, known as Northtree Real Estate, has created a way to virtually explore houses on the market, and the player is a beta tester for this new software.

But, as the player explores this house, they soon discover that there is more to this software than what it first appears to be. If they get too deep into it, they may find themselves sacrificing their soul as real estate instead.