Complex sentence: The music for the game was composed by Masashi Hamauzu, the leader composer for "XIII" and "XIII-2", Naoshi Mizuta and Mitsuto Suzuki, who composed the music for "XIII-2".
Split into simpler sentences: The music for the game was composed by Masashi Hamauzu, Naoshi Mizuta, and Mitsuto Suzuki. Hamauzu was the leader composer for "XIII" and "XIII-2", and Suzuki previously composed music for "XIII-2".