I've been meaning to bring this very issue up, as I've found, what I believe, the perfect song for us:

Heavy Metal Pirates, off of Black Sails At Midnight by Alestorm.

http://youtu.be/u9-kkZTBDGk

I heard about the concept of "Pirate Metal" about 6 or 7 months ago, and since I got these guys discography, I cannot hear that song without thinking mechwarrior and smiling. I've been using these guys(and some others, but mostly these guys) as my soundtrack for MWO. Seriously, listen to that and check these lyrics and tell me this song isn't about the blood pearls raiding and pillaging clan tech in giant stompy robots of cosmic steel(especially the chorus).

Sailing the seven seas of metal
 We thirst for blood, your ship is in our sights
 Taste a broadside from our cannons of steel
 Before our cutlasses of metal you shall kneel

 We are Heavy Metal Pirates
 We sail across the sky
 In our battleships of cosmic steel
 We're the terror up on high
 We are Heavy Metal Pirates
 Our cutlasses are true
 So give us all your treasure
 Or soon we'll come for you

 The wind is in our sails, and fate is on our side
 So raise the Jolly Roger and sail into the night
 We're warriors of steel upon the Spanish Main
 No quarter for the poseurs, we'll bring 'em death and pain

 We are Heavy Metal Pirates
 We sail across the sky
 In our battleships of cosmic steel
 We're the terror up on high
 We are Heavy Metal Pirates
 Our cutlasses are true
 So give us all your treasure
 Or soon we'll come for you

edit: other good songs by them to chack out, Back Through Time, Barret's Privateers, Rum(I think i played this one over coms once "RUM! RUM! RUM! YARRRRRR! RUM! RUM! AHOY!"), Death throes of the terror squid.... fuck it's all gold, you can put a playlist up of all their stuff and you got 3+ hours of badass story songs about drinking, fighting, revenge, and pillaging.