The catch is, that you'll need to be an existing owner of Layers of Fear to gain free access. In this "final prologue" chapter, you'll take the reins of a cursed Hollywood production as you step into the Director's seat and uncover a "dark secret".
"As the film’s creator, you have the power to shape scenes to your liking. You’re in charge of making the ultimate horror flick - with violence, gore and cosmic dread as your tools. Strive to complete your final masterpiece, even as the set around you devolves into chaos. Do you have what it takes to be great?"
You can access The Final Prologue as a separate chapter within the base game's menu. You can also check out a 15th-anniversary video celebrating Bloober Team in the video below: