Musical nerdery doesn't get much more epic than this performance by Bit Brigade, where they play the soundtrack to Mega Man II while the entire game is being played on a screen behind them.
And when I say the entire game I mean THE ENTIRE GAME, this video weighs in at an impressive 44 minutes and, to top it all off, they're actually a really good band, so the show isn't all gimmick and flash, it totally rocks!
--via Topless Robot