Money or Meteors
From Halopedia, the Halo wiki
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Money or Meteors is the 4th track from the Halo Wars: Original Soundtrack. The track runs for 3 minutes and 23 seconds and plays during the mission Arcadia City. There is also a shorter version of the track, 'Money or Meteors (Arcadia Intro)' which is the 4th of the DVD-exclusive songs on the soundtrack, which runs for 1 minute and 10 seconds.