Suite Autumn is a suite of short music pieces included in the Halo: Original Soundtrack.
It plays during the levels The Pillar of Autumn (0:49-1:27), Halo (0:00-0:48) and later (1:28-3:01), 343 Guilty Spark (3:02-4:24), Two Betrayals (parts 1 and 4), Keyes, and The Maw (1:28-3:01). The first part of this piece also plays in The Maw at the start of the chapter "Light Fuse, Run Away."
The tone is somber and somewhat ominous, adding to an atmosphere of uncertainty.
- The title of the piece is a play on the name of the plant called Sweet Autumn Clematis.