CASTLE Base

CASTLE Base is an ONI base located on the UNSC colony of Reach, inside Menachite Mountain, two thousand meters below the Highland Mountains. Protected by massive amounts of granite, reinforced concrete, plates of Titanium-A, and EMP-hardened metal, it is virtually bombproof, well defended and virtually impenetrable. CASTLE Base could withstand the force equivalent to an 80 megaton nuclear blast. The complex was originally a titanium mine, but was closed down after the mine breached the Forerunner complex below.

Dr. Catherine Halsey had an office in CASTLE Base, as did Colonel James Ackerson. The Spartan-IIs were familiar with CASTLE Base. During the Fall of Reach, the base was Delta Team's fallback position. William-043, Vinh-030 and Isaac-039 arrived here. They were soon accompanied by Frederic-104 and Kelly-087. It turned out that Dr. Halsey was left in the base as well in order to activate Operation: WHITE GLOVE to prevent the Covenant from getting UNSC technologies.

When the Covenant forces breached the base, Dr. Halsey was forced to put Operation: WHITE GLOVE into action, destroying the base and her assistant AI Kalmiya and preventing the Covenant from gaining any intelligence from the UNSC. Halsey and the SPARTANs retreated into the dangerous titanium mines below.

Known Sections

 * Level Aqua
 * Section Lambda
 * Armory
 * Level Scarlet
 * Omega Wing
 * Dr. Halsey's Office
 * Medical Wing
 * Cold Storage Facilities
 * Surgical Bays
 * Level Lavender
 * Section Sigma
 * Elevator Shaft

List of appearances

 * Halo: Reach
 * Halo: The Fall of Reach
 * Halo: First Strike