Gateway

The Gateway is a Forerunner structure on the Shield world of Genesis. It is located in the Coral highlands of the planet, hidden by the region's bio-readings. It serves as a link to the Domain.

Ancient history
While the Gateway was monitored by the Forerunners, it was rarely used by them. When the Halo Array fired during the Great Purification, the Gateway closed.

Post-war
However, when Blue Team was brought to Genesis in October 2558, Cortana manipulated them to begin opening the Gateway by activating several consoles. Blue Team was eventually forcibly brought through the Gateway.

List of appearances

 * Halo 5: Guardians