Having scored the film's precursor, Pitch Black, Graeme Revell has already familiarised himself with the universe of Riddick, and now fleshes out his moody score from the first film into a grand epic of action cues, regal anthems and grim suspense. Surprisingly enough, he uses the main theme from Pitch Black only a few times, even modifying it to carry a more epic scale.
A few tracks stand out from the rest, notably the "Hunt for Riddick", "One Speed" and the end credits. The Necromonger theme is also enjoyable. One track, "Imam's Death", surprised me by being just plain interesting, although I think it's unfortunate the label decided to reveal a major plot spoiler in the title.
In all I would say this is one of the more interesting and engaging Revell scores, and definitely one to pick up if you're a fan of the composer, the series, or just good film music.