Grounded: How to Find a Mossy Key to Open a Sunken Treasure Chest

Along with all the adventure and crafting, Grounded also has a few hidden treasures. Players will encounter various quests and materials that will be required to progress in the game. The Sunken Treasure Chest is one of them, however, you will need a Mossy Key to open it. If you can’t find it, then we are here for your help. In this guide, we will tell you how to find a mossy key to open a sunken treasure chest in Grounded.

Where can I find the Mossy Key in Grounded?

Here’s what you need to do to find the mossy key to open the sunken treasure chest in Grounded. For those who don’t know, in this chest players will find the BURG.L Sunken Outpost Chip, which can be used to obtain various upgrades. Before diving into the steps, don’t forget to equip your Spear or Bone Dagger and Slime Lantern. This is because it will be quite dark there. Also, equip the Bubble Helmet and Fins to swim with the Mertin Mutation for increased oxygen efficiency.

• First, head to the Underwater Pond Lab located in the Carp Pond.
• After that, the player will need to travel to the Pond Depths.
• Once you are underwater, you will see various huge lamps and several water pipes.
• Then just go to the water pipes that are located on the opposite side of the entrance to the underwater laboratory.
• After that, approach the area covered with seaweed and you will see the entrance to the cave tunnel.
• Then head into the tunnel and kill all the spiders you come across on your way.
• You will need to keep swimming until you reach the end of the cave.
• And at the end of the cave you will see a lot of wires and pipes, but go to the pipe that releases bubbles.
• And there you will find the mossy key you are looking for.
• After you have taken the key, we recommend that you take a breath while heading towards the entrance to the underwater laboratory. Otherwise, you may run out of oxygen (O2) and drown.
• After that, just find the sunken tyrannosaurus rex. It is located on the opposite side from the place where you found the mossy key.
• And next to the sunken tyrannosaurus you will find a large chest with sunken treasures.
• Then go forward and open the chest with the mossy key.
• And you will find the Sunken Outpost BURG.L Chip you were looking for.
• After that, take the chip and give it to BURG.Lu, located in the Oak Lab.
• And then you will get the updates mentioned below.
  • Spray Recipe
  • Finflop update
  • Modernization of a diving lantern

Here’s how you can find a mossy key to easily open a sunken treasure in Grounded.