Splash Hill Zone is the first zone of Sonic the Hedgehog 4: Episode I. It is a beautiful coastal area filled with rolling hills and an everlasting feeling of summer, making it the embodiment of an adventurous paradise. As Sonic the Hedgehog races through the smooth slopes and crisp rivers, he will also witness a spectacular sunset view from the top of the hills. The first Act takes place in early day, but Act 2 and onward take place during late afternoon. Many Badniks from the previous games return in this zone, as well as a revised version of Dr. Eggman's first mobile configuration.