From Halopedia, the Halo Wiki
Action Figure Hands is a track from the Halo Wars: Original Soundtrack
This song will play during gameplay on any campaign mission or Skirmish level set in the Covenant occupied planet of Harvest or the interior section of the Shield World.
It begins with somber, sad strings, synthesizers and piano. At about 0:37, computer-generated sounds come in. The piano briefly fades out, and then comes back in as the song progresses. Choirs are added about halfway through, followed closely by a drumbeat that resembles the beat in the Halo 2 song In Amber Clad. At 2:31, the drumbeat and choirs stop, and the piano and computer sounds fade out.