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★Beginner's Guide: Tips and Tricks
Get started with our story and collectible guides!
・Story Walkthrough and All Quests
・Yara Map and All Collectibles
・Best Weapons in the Game
・Best Armor Sets and Builds
・All Post-Game Content and How to Get 100%
Chorizo gives you a Mysterious Key that leads to an unknown destination. Read on to learn how to use this key, and the rewards that you can unlock!
List of Contents
The Mysterious Key is an item given to you by Chorizo. It can be used to unlock a secret treasure located in a small island in Isla Santuario. The key can be viewed in your Inventory as a part of your Logistics items.
One of the clues that the Mysterious Key offers are the words Guau-Guau
written on the side. This refers to Guau-Guau Island, which can be found in the middle of Casas Cove in Isla Santuario.
The quickest way to travel to this Island is by swimming from Armonia, which you can reach using fast travel. Upon arriving in the island, travel to the center until you reach a camp where a huge treasure chest is located.
Upon reaching the chest, you can use the Mysterious Key to open it and receive a special reward.
You will receive a unique weapon, a rifle called Fuck Anton. This is a weapon that fires poison rounds, making it a strong weapon to use against soft targets.
To acquire the Mysterious Key, you need to complete the Fetch Quest Yaran Story. This involves following Chorizo around the Guerrilla camp, and acquire different kinds of items along with a key.
Fetch Quest Mission Walkthrough
| Mission Types | |
|---|---|
| Operations | Yaran Stories |
| Treasure Hunts | Special Operations |
| Crossover Missions | |
| Other Story Guides | |
|---|---|
| How to Open the Locked Door in Fort Quito | Can You Capture Fort Quito? |
| How to Get the Aguda Cliffs Checkpoint Key | How to Use the Mysterious Key |
| GDP Oil Platform Container Puzzle | Should You Kill or Spare McKay? |
How to Use the Mysterious Key
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