Two years after X-Day, Cronos HQ was attacked by Agito Makishima and his resistance group Zeus' Thunderbolt. Using the Guyver Gigantic, Agito battled his way down into the base's lowest depths where he fought the Zoalords Waferdanos, Li Yentsui and Dr. Barcas himself. Gigantic Dark was able to defeat Yentsui and Waferdanos and planned to steal technology from the fossilized Ouranus ship as well as induct one of the HQ's top researchers into his organisation. Knowing that the base was lost, Dr. Barcas activated the self-destruct sequence in the hopes of destroying the Guyver along with the facility. Agito and his troops were able to escape, however, and the loss of the Arizona base would greatly undermine Cronos' power.