So there is this game called Jets'n'Guns. It's a 2D shoot-em up game, just like the old awesome arcade ones! Except this was released in 2004.
They wanted some really badass ingame music, so they got the Swedish band Machinae Supremacy to do an album just for the game. That band is quite awesome too, they use a SID chip of the old Commodore iirc, so they were perfect for the job, the music is amazing and awesome. Here are some of the best ones (which are also the 2 first ones heh)
Quite awesome, right? They're available for free download on their website: http://www.machinaesupremacy.com/jetsnguns.php
Here are some of their regular songs. I'm not that big a fan of their vocals, but everything else is awesome so.. :P
This was mainly about the music, but if you're interested, check the trailer out: