Template:Infobox song Infiltration is a track included in the Halo: Combat Evolved Anniversary: Original Soundtrack. It is heard throughout the Halo: Combat Evolved Anniversary campaign, replacing sections of Truth and Reconciliation Suite. It first appears during the level Halo. It is heard again during The Library.
It also appears during the opening cutscene of Two Betrayals. It is unknown what it has replaced in that instance, but the two pieces sound very similar. It is likely to be a background melody from Truth and Reconciliation Suite, though this has yet to be confirmed. It runs for 1:51.