Installation 04 (disambiguation)

Installation 04 may refer to the following:


 * Installation 04 - The Forerunner megastructure, also known as Alpha Halo.
 * Installation 04B - The replacement structure of the original Installation 04.
 * Installation 04C - The second replacement structure of the original Installation 04.
 * 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.
 * Battle of Installation 04 - The battle between Human, Covenant and Flood forces on Installation 04.
 * Raid on Installation 04B - A raid on the replacement structure near the end of the Human-Covenant War.