The Deluxe Version content for Three Fourths Home: Extended Edition includes an art and commentary book as well as a DRM-Free copy of the game's soundtrack.
Art Book
Three Fourths Home: Extended Edition - Art and Commentary is a 235-page eBook put together by Zach Sanford, the writer and designer for the game. It presents high-resolution game assets, promotional materials, "behind-the-scenes" images, and notes from throughout the game's development. It also includes commentary on the game's design and narrative.
Soundtrack
A high-quality, DRM-Free copy of the game's soundtrack.