After the Leviathan crashed onto Zeldrin's surface, its surviving robot crew invaded the canyon on which the vessel had landed. Ratchet and Clank came here to search for the Captain, only to discover an empty escape pod. Inside was a recording of Qwark requesting a taxi cab (While disguised as a woman). The duo realized that Qwark had staged his own death out of cowardice in facing Dr. Nefarious.
It was also while the two were on Zeldrin that Aridia was invaded by Dr. Nefarious' forces. They departed immediately to save the fallen planet.
The Zeldrin Starport orbited this world. It was a major transit point for numerous transports and starships.