On XXX: Three Decades of Roadrunner Records, the long-running metal label gets a career retrospective with a four-disc set that tracks the label's rise from underground importer to mainstream dominance. Featuring a who's who of the label's roster that includes the likes of Mercyful Fate, Biohazard, Type O Negative, Sepultura, Fear Factory, Megadeth, Down, Gojira, Rush, and even Lynyrd Skynyrd, this set shows the wide reach the label has had over the last 30 years, feeling like a survey course in the big trends in metal during that time period. And even though the label has had its fair share of highs and lows, anyone looking to dig into the history of modern metal will find a treasure trove of great tracks here.