Dread Intrusion

200px|right Dread Intrusion is a piece included in the Halo 3: Original Soundtrack. It plays during the level Floodgate.

The middle part of the piece(Black Tide) is a remixed version of the song Ghosts of Reach from the Halo 2: Original Soundtrack.

It runs for 5 minutes and 25 seconds.

At around 0:50, a reversed message can be heard. The voice sounds and echoes similar to the Gravemind.

Trivia

 * The message in this piece is the same as the one in the Gravemind music track.