The gamer world doesn’t know enough SID Metal.
Enter Machinae Supremacy, whose various albums have been on and off my regular playlist all the time.
Taking advise from one of the top comments from the Jets 'n Guns Soundtrack: Don’t listen to this music while playing FPS (or any action games, really), or you WILL be banned for hacking. I’ve tried it myself with countless Warsow-matches in the office. 