One of the forgotten gems among the USPM releases, Attacker's been around for some time now but had little luck with vocalists (one passed away, others left/got kicked out---> don't know about that but they aren't around anymore).
https://www.youtube.com/watch?v=CGEg2IaViCo
https://www.youtube.com/watch?v=bOjpynBkf0c&feature=related
https://www.youtube.com/watch?v=Nl5TuwfOJ6I&feature=related