After two years of early access, Obsidian Entertainment's Grounded has finally released in full, giving eager players access to the full experience. Alongside a full story to work through, Grounded's gameplay is more of a survival sandbox experience where players take on the roll of one of four protagonists that have been mysteriously shrunk down to the size of an ant and placed within the backyard of a suburban home.

It's up to players to survive inside the backyard by exploring, crafting tools, building bases, and staying alive with food and drink to figure out why this strange science experiment has taken place. Naturally, the backyard is full of dangers like Wolf Spiders, Koi Fish, and other apex predators like the Hedge Broodmother, though players will need to face these creatures in order to harvest useful resources and equipment. However, Grounded does have a bit of an openness to it, where players are pushed to discover many things on their own.

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This sense of discovery and exploration also applies to finding resources within the world, many of which needs to be found in particular locations within the backyard. This includes materials like Sunken Bones, which are important resources for those looking to craft useful and powerful mid-game gear in Grounded.

grounded koi pond

What Are Sunken Bones?

As a resource, players will need to find plenty Sunken Bones in order to craft weapons and gear. Specifically, Sunken Bones are useful materials for crafting under-water related items, which are immensely helpful for fully exploring watery locations like the Koi Pond, Flooded Zone, and Pond Depths.

In terms of weapons, the Sunken Bones can be used to help create the following at a Workbench:

  • Rusty Spear - This tier 3 weapon can inflict the Infection debuff on enemies which reduces speed and attack damage that can stack. Players can obtain this recipe by analyzing rust and reaching Brainpower Level 14.
  • Bone Dagger - An upgrade from the Pebblet Dagger, this 1 handed tool can be used underwater for harvesting items like Soggy Roots or in combat against enemies like the Diving Bell Spiders. The recipe can be unlocked by analyzing a Diving Bell Spider Chunk and the dagger only needs 1 Sunken Bone to repair.
  • Bone Trident - Another Tier 2 weapon similar to the Bone Dagger, this trident is also extremely useful underwater. Not only does it have great attack speed, but unlike other spears, it can inflict stun. The recipe can also be unlocked by analyzing a Diving Bell Spider Chunk but costs 2 Sunken Bones to fully repair.

In addition to weapons, Sunken Bones can also be utilized in creating extremely useful tier 2 armor when using a Workbench.

  • Koi Scale Chestplate and Greaves - Upper body light armor, the Koi Scale set is great for those who are good at perfect blocking. The Perfect Block Effect greatly increases the timing window for getting a perfect block, while the Sleek upgrade effect Parry Stun greatly increases the amount of stun following a perfect block. With both pieces equipped, players gain the Dazzling Riposte bonus which reduces enemy defense after a perfect block.
  • Bubble Helmet - Light armor worn on the head, this item is extremely valuable for exploring water. Although limited on defense, this item adds 80 seconds to the player's oxygen meter for a total time of 180 seconds. It also comes with a Sleek Armor Upgrade called Hyperstamina which further increases stamina regeneration rate.
koi fish creature grounded

Where to Find Sunken Bones

Considering that the armor and weapons created from Sunken Bones relate to water, that's where players will want to head to find them. When searching the Koi Pond, players can spot them sticking out of the ground almost like teeth. Players will need to use an acorn shovel in order to dig them out.

Outside of the Koi Pond, players also have a chance to find Sunken Bones from Buried Treasure inside of the Sandbox biome. This area is located in the southwest corner of the Backyard. FInally, the third location where Sunken Bones can be obtained are from pieces of buried treasure withing the BBQ Spill biome in the north beyond the Upper Yard Ascent.

One thing to keep in mind is that all three of these zones are hazardous, though the Koi Pond is largely the easier to manage of the three as well as easier to get to earlier in the game. The other two biomes have dangerous insects like Antlions, Ladybird Larvae, and Wolf Spiders. In addition, both biomes are considered hotter zones and come with a Sizzle Effect that slowly kills the player the longer that they're impacted by it. When exploring these zones, players will want to ensure they have proper armor such as Antlion gear or eat some of Grounded's various foods that provide Sizzle Protection like the Quesadillantlion.

Grounded is available to play now on PC, Xbox One, Xbox Series X/S, and Xbox Game Pass.

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