Installation 04 (disambiguation)

Installation 04 may refer to the following:


 * Installation 04 - One of the Forerunner's anti-Flood megastructures, also known as Alpha Halo.
 * Installation 04B - The replacement structure of the original Installation 04.
 * Installation 04 (firefight map) - The Halo: Reach Firefight level bundled with Halo: Combat Evolved Anniversary and included in the Anniversary map pack.
 * Installation 04 (music) - A soundtrack included in the Halo: Combat Evolved Anniversary Original Soundtrack.
 * Battle of Installation 04 - The battle between human and Covenant forces on Installation 04.