I'll name a band and then the next person has to match that band up against another...
Example Person 1: Lamb of God Person 2: Lamb of God vs. Killswitch Engage
...And then the next person has to pick which band he/she thinks would win and match them against another band and say why the band they chose would win...
Example Person 1: Lamb of God Person 2: Lamb of God vs. Deicide Person 3: Deicide vs. Avenged Sevenfold I like the vocals better