After original guitarist Bobby Gustafson left, Overkill hired two guitarists to take his place on 1991’s Horrorscope. That the group had to hire four hands to replace Gustafson’s two says a lot about him, but new guitarists Rob Cannavino and Merritt Gant gave the fresh material serious thickness. The band’s tight-knit rhythms reach a fulminating peak on “Frankenstein” and “Thanx for Nothin’,” which have to rank as two of the funkiest thrash songs ever recorded. Where Overkill was once a scrappy New Jersey upstart, here the band sounds stadium-ready. “Blood Money,” “Bare Bones," and “Nice Day…For a Funeral” have a huge presence, reflecting the transformation of metal from a small subculture of loyal diehards to an enormous global army. Even though Horrorscope boasts Overkill’s biggest and baddest rock songs, it also shows the group’s versatility. Whether it’s the strangely dissonant guitar sounds on “Coma” or the slow-grinding, industrial groove of “Horrorscope,” Overkill proves its devotion to finding new ways to experiment with the thrash template.