Hailing from Birmingham, England, grindcore gods Napalm Death have been hammering away since 1981, leaving a trail of crushed skulls and shattered eardrums with every one of their Cookie Monster-voiced albums. Canadian prog-thrash masters Voivod have been at it nearly as long (since 1982), and have kept their unique futuristic sci-fi metal speeding along despite the 2005 death of guitarist Denis “Piggy” D’Amour. Also on the two bands’ co-headlining Through Space and Grind tour are Exhumed, Iron Reagan, Ringworm, Black Crown Initiate, and Blast Furnace.