Deck Gamma Monitor Hall is a room in the Frigate Orpheon in Metroid Prime. Its only purpose is to connect two rooms. It is encountered while Samus is escaping the destruction of the Orpheon. It cannot be revisited after the Frigate crashed, because boulders block the door in the Reactor Core, but Samus can make the door of the room out through the cracks. The door that connects Biotech Research Area 1 and Connection Elevator to Deck Beta is blocked with debris after the Frigate crashed, and that is the only other way to access this room, by taking the elevator that connects this room, and Biotech Research Area 1.
- Reactor Core (on the blocking side of a one-way Door)
- Connection Elevator to Deck Beta (via Blue Door)
- "Entrance to Connection Elevator"
- Door to Reactor Core
- "This door has been sealed to prevent radiation leaks."