Watch Deathgasm: GOREMAGEDDON Full Movie Free Online 123Movies. After failing to reform his heavy metal band DEATHGASM for a battle-of-the-bands to win back his girlfriend Medina, Brodie decides to use black magic to raise his ex-band members Zakk and Dion from the dead. However, his resurrected friends become unpredictable and dangerous, leading to chaos in the town.