composer Atlas Plug and Celldweller all rights belongs to Rare IronGalaxyStudios and Microsoft. credit goes to RKosmik for putting out these soundtracks in first place.
I like to think that Gargos is a pit fiend from the Nine Hells, out to win the Blood War and conquer the entire Planescape, and then he runs into a demon who's basically Orcus, Baphomet and Demogorgon all in one, and is just as evil as himself, but completely lacks any ambition beyond bashing the basher who tried to bash him.