Despite cameos from David Bowie and Reeves Gabrels, Sister Machine Gun’s fourth album Metropolis doesn’t sound that much different than their previous three — it is still the same mix of metal and Nine Inch Nails. Even if the group isn’t showing any signs of great leaps in creativity, Metropolis is one of the group’s most consistent efforts, offering a pummeling array of rattling beats and shattering guitars. – Stephen Thomas Erlewine