To understand the software, one must first understand the hardware it was designed to support. When the original Wii Sports launched in 2006, players were enamored with the concept of motion control, but the reality was often limited. The original Wiimote used an accelerometer and an infrared sensor, meaning the console could only guess at rotation and position.
Furthermore, Rev 1 was updated to include the revised European PEGI rating stamp (changing from the old 7+ logo to the new 7+ with the black background) on the disc’s inner ring metadata, though this is only visible in raw disc dumps.