Installation 04 (disambiguation)

Installation 04 may refer to the following:

Installations

 * Installation 04 - The Forerunner megastructure, also known as Alpha Halo.
 * Installation 08 - The first replacement structure for Installation 04.
 * Installation 09 - The second replacement structure for Installation 04.

Events

 * Battle of Installation 04 - The battle between Human, Covenant and Flood forces on Installation 04.
 * Raid on Installation 08 - A raid on the replacement structure near the end of the Human-Covenant War.

Real World

 * Installation 04 (level) - The Halo: Reach firefight level included in the Anniversary Map Pack.
 * Installation 04 (music) - A soundtrack included in the Halo: Combat Evolved Anniversary Original Soundtrack.