Once players progress far enough into the Corel Region in Final Fantasy 7 Rebirth, they'll unlock the ability to explore the desert area surrounding the Gold Saucer. There, they will gain access to a new set of Protorelic challenges that revolve around strange-looking modular power reactors spread around the area. Heading to the first reactor will begin a new sidequest that has players traveling to an array of Cactuar-shaped rocks to gain access to these buildings and then undergoing a unique mini-game once inside.