Unidentified Forerunner ship (Babd Catha)

{{HideSpoilers The Babd Catha Forerunner Complex was an ancient Forerunner complex on the planet Reach. In 2552, it was located underneath Sword Base on the Babd Catha Ice Shelf. It was the home to one of Dr. Catherine Halsey's labs, and had evidentally been under excavation by the Office of Naval Intelligence for some time.
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According to Dr. Catherine Halsey, the complex held secrets that could turn the tide of the Human-Covenant War—a "latchkey" discovery that Halsey compared to the invention of the conical bullet and the Shaw-Fujikawa Translight Engine. However, when the Covenant began attacking the facility, the decryption was only partially complete. Using Wolf Spider turrets, Noble Team was able to hold off the Covenant for long enough until Halsey could finish the decryption.

Trivia

 * The Babd Catha complex marks the second large Forerunner complex on the planet Reach, perhaps suggesting that Reach was somehow important to the Forerunners.

List of appearances

 * Halo: Reach
 * The Package