The area consists of a large desert surrounding the capital of Lucis, Insomnia, with gas stations and repairs shops spawning through the locale. Hammerhead is the most important shop in the region, owned by Cid Sophiar and his granddaughter, Cindy Aurum.
To the north of the region, a royal arm can be found in a dungeon, and the party can also explore an abandoned mine and sewer area near the gate to Insomnia where higher level monsters can be found. The infamous Bandersnatch also makes its home in a small lake area northwest of Hammerhead station.
Leide used to be covered by the Wall projected by the king of Lucis, but as Niflheim intensified its attack the Wall's power was concentrated over the Crown City and Leide became vulnerable. A fearsome wyvern once stalked Leide whose gaze is said to have turned the Ostium region to stone.
In M.E. 725 Niflheim invaded the Lucian regions of Leide, Duscae, and Cleigne, where they established bases–yet there was a period of peace afterward. Lucis dispatched soldiers to challenge the empire, but was defeated. Leide used to get purified water from the Crestholm Channels, but after the imperial takeover the facility ceased operations.
During Prince Noctis's journey to wed Lady Lunafreya in M.E. 756, his car, the Regalia, breaks down. Noctis and his traveling companions seek help from the mechanic Cindy Aurum at the local Hammerhead garage. They meet her grandfather, Cid Sophiar, who berates Noctis, saying he is not ready to become the king of Lucis. On a radio in a diner, a newscast talks about the king soon signing a peace treaty with the Empire of Niflheim, and how Leide will be among the areas that will be annexed to the latter. Though the people who live on such outlands oppose, the citizens of the crown city of Insomnia support the annexation if it will bring peace to the nation.
While Cindy fixes the party's car Noctis and his friends help a man named Dave who has been hunting monsters, and find there are numerous hunts they can take on in the area. Cindy asks them to take something to a local motel where Noctis runs into a dog named Umbra. Umbra delivers Noctis a red notebook he has been using to keep in secret communication with his bride-to-be, Luna.
At the port in Galdin Quay they find that the ferry is not running. They stay the night and the next morning learn that Insomnia has been attacked by Niflheim. They turn back only to find the route to Insomnia blockaded by the Empire. Noctis learns his father has been killed, and returns to Hammerhead. With help from Cor Leonis of Insomnia's Crownsguard, Noctis embarks on his quest to collect the Royal Arms of his forebears to gain power enough to reclaim his kingdom. After finding two royal tombs in Leide, Cor helps Noctis and his friends demolish an imperial blockade to the Duscae region, and the party leaves Leide.
Noctis keeps in contact with the Hammerhead crew, receiving help in tracking down the Regalia when the car is seized by the Empire, and for repairing King Regis's ship they discover in a secret harbor at Cleigne. After Noctis escapes the continent on his late father's ship, he doesn't return for ten years.
Ten years later, Noctis returns and docks King Regis's ship at the abandoned Galdin Quay that has been overtaken by daemons. After Noctis disappeared in the aftermath of his infiltrating the Empire, the sun never rose again and the world was plunged into chaos. Leide is roaming with daemons and few people live there anymore, but the Hammerhead is still being used as a hunters' HQ. Noctis is picked up by Talcott Hester and brought to Hammerhead where he meets his old friends. After setting up camp one last time outside Insomnia, the party heads to the ruins for Noctis to fulfill his destiny as the True King to bring light back to the world.
|When You Believe||Rescues||Reach Chapter 09 and complete "Palpable Pain"||1,000 EXP, 6,000 Gil|
|Palpable Pain||Rescues||Reach Chapter 02 and complete "Tired of Running"||350 EXP, 900 Gil|
|Tired of Running||Rescues||Available from the start||300 EXP, 500 Gil|
|Distress in the Desert||Rescues||Reach Chapter 02 and complete "Lost Without a Potion"||350 EXP, 900 Gil|
|Lost Without a Potion||Rescues||Reach Chapter 02 and complete "Search and Rescue"||350 EXP, 900 Gil|
|Search and Rescue||Rescues||Complete "The Mutant Marauder"||300 EXP, 500 Gil|
|A Cry for Help||Rescues||Visit the Longwythe Rest Area and speak to the motel owner to advance "The Errand Prince"||300 EXP, 500 Gil|
|An Exaggerated Injury||Rescues||Reach Chapter 02 and complete "Scared and Stranded"||300 EXP, 900 Gil|
|Scared and Stranded||Rescues||Reach Chapter 02 and complete "A Cry for Help"||350 EXP, 900 Gil|
|Conceal, Don't Feel||Rescues||Complete "A Cry for Help"||300 EXP, 500 Gil|
|Stranded on the Sand||Broken Cars||Reach Chapter 02 and complete "Highway Helper"||500 EXP, 900 Gil|
|Automotive Agitation||Broken Cars||Reach Chapter 09 and complete "Stranded on the Sand"||1,500 EXP, 6,000 Gil|
|Unlucky Driver||Broken Cars||Available from the start||300 EXP, 500 Gil|
|Car-mic Retribution||Broken Cars||Reach Chapter 04, visit Cape Caern, and complete "Broken-Down"||500 EXP, 1,500 Gil|
|Waiting for Help||Broken Cars||Reach Chapter 04 and complete "Car-mic Retribution"||350 EXP, 900 Gil|
|Roadside Assistance||Broken Cars||Reach Chapter 03 and complete "Stranded on the Sand"||500 EXP, 900 Gil|
|Highway Helper||Broken Cars||Available from the start||300 EXP, 500 Gil|
|Carless in a Car||Broken Cars||Reach Chapter 09 and complete "Highway Helper"||1,500 EXP, 6,000 Gil|
|One Tune-Up Too Many||Broken Cars||Reach Chapter 03 and complete "Unlucky Driver"||350 EXP, 900 Gil|
|Broken-down||Broken Cars||Available from the start||300 EXP, 500 Gil|
|Photo Op: Mountain||Photo Ops||Reach Chapter 03||200 EXP|
|Photo Op: Quarry||Photo Ops||Reach Chapter 04||200 EXP|
|Photo Op: Quay||Photo Ops||Reach Chapter 03||200 EXP|
|Photo Op: Battlefield||Photo Ops||Reach Chapter 05||200 EXP|
|Rise and Shine and Run||Tours||Camp in Lachyrte Haven||20 AP|
|Stirred, Not Shaken||Tours||Camp in Cotisse Haven||20 AP|
|The Hallowed Hill of Hammerhead||Tours||Camp in Palmaugh Haven||20 AP|
|Gone Hunting||Dave||Complete "The Errand Prince" during Chapter 01||500 EXP, Hi-Potion x10|
|Dust to Dust||Dave||Reach Chapter 02 and complete "Gone Hunting"||600 EXP, Mega-Potion x5|
|Hunters and Gatherers||Takka||Complete "Scenic Delivery"||500 EXP, Cleigne Wheat x5, Dualhorn Steak x5, Leiden Pepper x5, Hammerhead Hot Sandwich|
|Scenic Delivery||Takka||Complete "The Power of Kings" during Chapter 02||300 EXP, Gighee Ham x2, Leiden Potato x2, Sheep Milk x2, Funguar x2|
|The Ever Regal Regalia||Cindy||Reach Chapter 02 and complete "The Power of Kings"||150 EXP, Aero Wax component|
|A Place to Call Home||Vyv||Complete "Vyv's Volcanic Inspiration"||3,500 EXP, 17,500 Gil, Time photo filler|
|Chase That Chocobo!||Wiz||Complete "A Feathery Fest"||2,000 EXP, Valfruit Seeds x1, O'Ghomoro Berry Seeds x1, Cieldalaes Pineapple Seeds x1, Han Lemon Seeds x1|
|A Legend Is Born||Randolph||Reach Chapter 15||8,500 EXP, Iron Duke|
|Balouve Mines||Dungeons||Enter Balouve Mines||10,500 EXP, Bow of the Clever|
|Crestholm Channels||Dungeons||Enter Crestholm Channels||10,000 EXP|
|Formouth Garrison||Dungeons||Enter Formouth Garrison||10,000 EXP|
|Let Sleeping Mountains Lie||Multiple||Return to Lucis via Umbra Chapter 9 or later||Unlocks Lonely Rumblings in Longwythe Hunt|
In the Windows and Royal Editions, the player can gain access to Armiger Unleashed by interacting with the statue of the Founder King in northern Leide, in the ruins of Keycatrich, after they have collected all thirteen royal arms.
Leide is a first person singular present of the German verb leiden. Leiden is a German verb meaning "to suffer; to feel pain."
- NPC dialogue with Hunters reveals there used to be a tunnel across Leide dug out by the royal family.