It is what it says, the best metal and hard rock releases from 2012, chosen by the last.fm community. This is a work of progress offcourse since we're far from the end of 2012. Keep tagging new albums released in 2012, so that this tag page becomes more detailed! ;)
For more info: http://www.last.fm/group/TAG%3A+%22best+metal+and+hard+rock+albums+of+%5Binsert+year%5D%22 .