Complex sentence: He also has his own audio series written by and starring Atherton, the first episode of which was produced in collaboration with amateur audio groups Darker Projects, and is now a continuing audio series hosted by BrokenSea Audio Productions.
Split into simpler sentences: He also has his own audio series written by and starring Atherton. The first episode of which was produced in collaboration with amateur audio groups Darker Projects and is now a continuing audio series hosted by BrokenSea Audio Productions.