Halo Nation

Unnamed Forerunner A.I

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This article or section's title is a callsign, an alias, or a nickname, as no proper name for the subject has been revealed. You can help by adding it if it is now known.

An Unnamed Forerunner A.I. was a construct located on Shield 0459.[1]


When the UNSC Spirit of Fire went into the underground section, the AI detected a "high order" Flood infection and an "unknown alien" intrusion. The AI autonomously initiated "Stage 3 Defense Protocols," which included activating Sentinels, cleansing rings, and Super Sentinels to clear away the Flood and the intrusion.


“Security barrier breached. High order infection detected. Unidentified alien intrusion detected. Initiating Stage 3 Defense Protocols.”
— When Spirit of Fire entered the Shield World
“Decontamination sequence commencing.”
— Before releasing a cleansing ring



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