Wallpaper Engine is a app developed and published by Valve Corporation. The app was released on April 5, 2017, for Microsoft Windows. The app allows the user to use images and videos as wallpapers and live wallpapers on their desktop.

Wallpaper Engine is a desktop wallpaper app with a library of animated wallpapers or "engines". These engines can be simple, like a spinning globe, or more complex, like a 3D game that you can play on your desktop.