"Chozo script translated."

This article's name is an unofficial translation from official German media and may not represent the canonical English name, if one exists.
An alternate name from an official source may be required.

"What's the matter? All I said was that Komaytos look like little Metr—"

Non-canon warning: This article or section contains information that may not be considered an official part of the Metroid series in the overall storyline by Nintendo.

Horus IV is only mentioned in unused text from Metroid Prime 3: Corruption. It is likely associated with the Horus Rebellion, which was mentioned in-game.

Unused Logbook entry[]

Aurora Unit 313

Metroid Prime 3: Corruption

Temporary scan

Galactic Federation Datafile AU-313.
(Aurora Unit 313)
Data moved to Logbook for review.

Logbook entry

Before its abduction from the G.F.S Valhalla, Aurora Unit 313 was in service for twelve years. Available data indicates that the unit is out of order, and was possibly involved in the corruption of the Aurora network.

313 has always shown a satisfactory performance during its career, however, there were concerns about its unusually high aggression potential. As one of the few AUs, 313 was awarded the medal of honor. After the bridge crew fell during the Battle of Horus IV, it assumed command of the Valhalla. Without this fast action, the battleship would have been lost.

Non-canon warning: Non-canonical information ends here.