We’ve just had brought to our attention the awesome musical stylings of a band called Metal Driver- http://www.megadriver.com.br – a brazilian rock band who cover video game music with a metal twist. They have some some awesome versions of Sonics Green Hill Zone, Mario theme and more for you to listen to. Best of all, the tunes are all free to download. Suggest you check it out if metal and video game music is your thing.
They also have covers of some metal video game tracks and provide a nice twist on things like Sonic Adventure 2’s Live and Learn and the Duke Nukem title theme tune.