Requirements: You will need to have completed Rune Mysteries and Goblin Diplomacy to do this quest. In addition, you will need a Pickaxe, and a Source of Light. To complete the quest you will need level 17 Mining, level 13 Agility, and level 13 Thieving.
Recommendations: A Tinderbox is highly recommended, or a Lantern that wont cause swamp gas to explode such as the Bullseye Lantern.
A Monsterous Quake-
To start The Lost Tribe quest, speak to Sigmund on the second floor of Lumbridge Castle. Ask for a quest and he will tell you that there was some damage to the castle recently, and he believes it was a monster. He will tell you to ask around Lumbridge to see if anybody saw anything. You will need to ask until you find someone who saw something; the possible people are Father Aereck, Bob the Axe Salesman, the Castle Cook, and Hans. Once you find them, head back to Lumbridge Castle and tell Duke Horacio what was seen. Duke Horacio will give you permission to investigate and suggest that you unblock the tunnel.
A Goblin Brooch-
Now make sure you have the required items then head back to the first floor and climb down the trapdoor in the kitchen. Head to the South East section of the basement and use your pickaxe on the rubble in the wall to clear a hole Now squeeze through the hole and walk in a bit until you find a Brooch lying on the ground, grab it then go back and speak with Duke Horacio. Sigmund will try to convince the Duke to attack nearby goblins but the Duke will insist that you find proof it was goblins, he will suggest that the librarian in Varrock might be able to help.
Goblin Greetings-
Head to Varrock Castle and ask Reldo about the Brooch, he will tell you to that there’s a book about ancient goblin tribes on one of the western bookshelves. Once you find it you will need to go to the last page, then when you exit the book your character will mention that the Brooch looks like it has a Dorgeshuun symbol on it. You’re going to need some more info though, so head to the Goblin Village above Falador and ask one of the Generals if they have ever heard of the Dorgeshuun. Tell them it doesn’t really matter when they disagree, then that either way they refused to fight, they will tell you that the Goblin God trapped them in a cave long ago. Tell them about the Brooch, then ask them to show you both greetings, you will now have 2 new emotes available.
Don't Get Lost-
Now go back to Lumbridge and speak to Duke Horacio once again, tell him about the goblins and he will being to prepare to troops but asks you to learn more about the goblins. Head back into the caves in the basement and go to fork in the cave. Though it’s not required you might want to head down the south tunnel and user your pickaxe to unblock a hole in the wall, this hole can be used as a shortcut from Lumbridge Swamp Caves. Just don't go through it. Then follow the map below, if you don’t follow it you will hit a trap and get hurt or dropped into a dangerous cave!
The Dorgeshuun-
Once you reach the end you will be in the Dorgeshuun Mines, speak to Mistag who will be near the entrance. He will scream for help, so do the Goblin Bow emote and he will realize you are a friend. He will tell you that they didn’t mean to break into the sewer and asks to make peace with Lumbridge. Now right click on him and choose the follow option to skip the maze, then go speak to the Duke. Tell him that you made contact and he will inform you that some silverware was stolen from the cellar and that it must be returned or they go to war.
The Wrong Advice-
Now pickpocket Sigmund to get a key and open the chest in the other room to find a set of H.A.M. robes. Your character will realize that Sigmund must be a member of the Humans against Monsters cult. Now head out of the castle. You will need to go to the H.A.M. headquarters, which are under a trapdoor in a collapsed building right between Lumbridge and Draynor Jail, just follow the dirt path west of the General Store. Pick the lock on the trapdoor and go inside. Search the crate in the first room to find the silverware. Go back and tell the Duke what you found, he will fire Sigmund and give you a peace treaty to bring to Mistag.
A Happy Ending?-
Head back into the cellar caves and a cave goblin will be waiting by the Brooch, you can follow him to the mines. Speak to Mistag and he will summon Ur-tag, the leader of the goblins. A short cut scene will follow showing the signing of the treaty and Sigmund spying on them, and then the quest will be complete!
Rewards: 1 Quest Point 3,000 Mining Experience A Ring of Life Access to the Dorgeshuun Mines Shortcut to Lumbridge Swamp Caves Ham Shirt, Robe, and Hood. Goblin Emotes
