Complex sentence: The "Nike ONE" is a hypothetical high performance vehicle concept car developed by Nike and Polyphony Digital that is featured on the Gran Turismo 4 video game for the Sony PlayStation 2.
Split into simpler sentences: The "Nike ONE" is a hypothetical high performance vehicle/concept car that was developed by Nike and Polyphony Digital. This vehicle is featured on the "Gran Turismo 4" video game for the Sony PlayStation 2.