Splash Hill Zone is the first level in Sonic the Hedgehog 4: Episode I. It is similar to Green Hill Zone and Emerald Hill Zone, and contains many of the same concepts, such as spinning sunflowers, Moto Bug badniks and oddly shaped palm trees. The level was featured in the official trailer on Sega's website and was the only playable level in the E3 2010 demo.
The different Acts in this level are set at different times of the day; a similar system to Knuckles' Chaotix.
||A beautiful coastal area filled with rolling hills and an everlasting feeling of summer, Splash Hill Zone is the embodiment of an adventurous paradise. As Sonic races through the smooth slopes and crisp rivers, he will also witness a spectacular sunset view from the top of the hills.
— Description on the Sonic 4 site
- Act 1 - The Adventure Begins
- Act 2 - High Speed Athletics
- Act 3 - Sunset Dash
- Boss - Showdown with Dr. Eggman
- Buzzer - Wasp enemy, flies and fires a missile at you then keeps flying.
- Bubbles - A blue, spike-welding bubble.
- Newtron - Disappearing lizard bot.
- Moto Bug - Insect bot that rides around.
- Chopper - A piranha bot that jumps from under bridges.