Belly of the Beast
From Halopedia, the Halo wiki
Not to be confused with Into the Belly of the Beast.
Belly of the Beast is the second track in Halo 4: Original Soundtrack.
The track features a rhythmic melody by synth and piano, accompanied by heavy percussion. The melody becomes more intense and rises in pitch, creating a sense of urgency, eventually building up to a climatic ending.
The track can be heard: