From the press release -
Two high-school metalheads discover the ultimate demonic riff…one that actually unlocks the Gates of Hell. In the resulting carnage, the two headbangers join forces with a metal maiden to save their small New Zealand town from a supernatural onslaught.
The horror-comedy hit that Bloody Disgusting declared "the most metal film ever" is now available on Shudder. Fans of DEAD ALIVE, HOUSEBOUND and WHAT WE DO IN THE SHADOWS: raise your horns, and dig into DEATHGASM at the link below.