Controller Companion is a PC utility built around a straightforward premise: keep using a controller when you are outside a game or Steam Big Picture. Instead of reaching for a mouse and keyboard to launch a game or manage the PC from the couch, users can navigate the desktop with controller input. Its design extends familiar gamepad controls into everyday computer use rather than presenting a conventional campaign or competitive mode.
Its desktop controls assign mouse movement to the left thumbstick and scrolling to the right. Clicking the left stick brings up an arcade-style keyboard for desktop input, while button remapping lets users customize the layout. The controller can also switch between connected monitors or TV screens and operate a music player, including playback and track changes. Another listed feature turns off an Xbox 360 wireless controller when the PC shuts down; that behavior is specifically identified as Xbox 360-only. Controller Companion runs in the background and disables itself when Big Picture starts, with a stated override for fullscreen programs.
Its role is desktop navigation and device control, with remapping and controller compatibility helping determine how it fits into a particular setup.