Loudwire has launched what it's calling the "Extreme Metal Olympics," which pits 32 of metal's most ferocious bands against each other in four groups of eight. 

Group 1 includes no Roadrunner bands, but we recommend voting for Lamb of God, for obvious moral-support reasons.

Group 2 includes Sepultura, who may not be on Roadrunner anymore, but still deserve your support.

Group 3 includes Gojira, who just put out one of the best metal albums of the year.

Group 4 includes Opeth, who are fucking awesome.