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Genre: Role-playing (RPG), Adventure, Indie

Core Keeper

Hotfix 0.7.0.3


  • Fixed crash happening when cattle produces item

Core Keeper - Patch Notes - 0.7.0.2

Bug Fixes: 


  • Fixed Sunken Sea water looking broken during Valentine's season.
  • Fixed a bug where tiles with bridges would behave in an unexpected way after a Crystal Snail would move over them.
  • Fixed bug where Atlantean Worm boss would not have any segments except the head moving around.
  • Fixed cattle health being affected by World mode setting.
  • Fixed an issue where some items were drawn to the wrong part of the map UI.
  • Removed an error log message that was printed each frame, causing performance issues.
  • Fixed a bug where a specific tree in a unique crystal scene would drop too many of the new rare gemstones as it unintentionally scaled with the amount of players in the game.
  • Fixed a bug with Alien Tech Chests from the new combat event not stacking after picking it up the first time.
  • Fixed an issue where cattle could not be placed in the world after put in cattle cages.

Hotfix 0.7.0.1


  • Fixed not being able to enter world while in Cherry Blossom or Valentine season.
  • Fixed crash happening sometimes when a creature is chasing a target.
  • Fixed dedicated server not working with a relative -datapath set.

Welcome to the Shimmering Frontier!

Introducing the Shimmering Frontier, a glimmering new biome for you to explore!

Grab your mining picks and stock up on provisions because you’ll want to spend plenty of time uncovering the mysteries of these crystalline caverns. From digging up the dazzling new Solarite Ore all the way to testing out your combat skills in one of our new ancient battle arenas, we can’t wait for you to discover all the new content that’s coming with this major update.



Keep an eye out for new enemies in the form of crystal-mimicking Mimites, insectoid Nilipedes, and GIANT Snails roaming this biome…and be extra careful that you don’t accidentally wander into a field of radioactive crystals – unless you’ve got yourself a Radiation Suit of course. Dangers lurk as you delve ever deeper into this subterranean world, but with a little help from the new Upgrade Station, you can ensure your equipment is up to the challenge.

Mining your way through the underground just got a whole lot easier too, thanks to the Hand Drill, which allows you to move and dig at the same time, and the all-new Obliteration Ray, which is exactly as cool as it sounds. It’s never been easier to forge a path and uncover the resources you’ll need to thrive in the underground. Especially with new crops, fish, recipes, and the Livestock Workbench (improved Cattle transportation, anyone?).



If building a cozy autumnal base is more your vibe, then you’ll love the 40+ new decorative materials and items that we’ve added. Oh, and you’ll be pleased to know that we’ve balanced enemies so that, for the most part, they can no longer destroy defensive base-building options such as doors, fences, and crafted walls. No more frantic mining while you’re out gathering resources wondering if you’ll come home to find a Big Larva has busted into your base.

We’ve said it before, but the Shimmering Frontier biome is just the tip of the iceberg when it comes to this update. We’ve added over 50 new pieces of equipment throughout the whole game and plenty of new content to our existing biomes including a new species of cattle that you can find in the Sunken Sea. Be careful if you’re travelling by boat, however. There’s something lurking deep below the waves, and it’s even meaner than Omoroth!



We could spend an eternity walking you through all the wonderful new additions to the game, and you can certainly get an idea of what’s to come in our patch notes, but we think the best way to learn about all our new content is to discover it for yourselves! We hope you have a blast playing through this major update and we hope you’ll tell us all about your adventures in the Steam Discussions, on Twitter, and over on the official Core Keeper Discord.

Oh, and don’t forget to let your friends know that Core Keeper is currently available at a whopping 33% discount as part of the Fireshine Games publisher sale! There’s never been a better time to bring your friends on an underground adventure, so head on over to our Steam store page to pick up the game now. Hurry because this discount ends on October 9th.

Core Keeper - The Shimmering Frontier Patch Notes - 0.7.0

Major Updates: 


  • New biome: The Shimmering Frontier. The Shimmering Frontier can be found in any direction far out in the world. 
  • Atlantean Worm boss: Confront the aquatic leviathan! 
  • New types of challenging events can be found in The Shimmering Frontier. Complete them and be rewarded! 
  • Upgrade Station. Crafted at the Scarlet Workbench, this station allows players to upgrade the item level of equipment, tools, and weapons making them stronger. This allows players to use a much larger variety of equipment setups, as lower-level items can become competitive with late-game items, but at a cost of upgrading them.  
  • Over 50 new pieces of equipment! 

Gameplay: 


  • 3 new enemies: 
  • Orbital Turret. 
  • Mimite. 
  • Nilipede. 
  • 1 new roaming creature: Crystal Snail. 
  • 1 new species of cattle: Kelple. Kelple is a turtle-like cattle that roams the beaches in the Sunken Sea and eats kelp to produce Kelp Dumplings. 
  • Cattle breeding. Cattle can now breed to spawn baby cattle. A baby cattle will spawn when two cattle of the same type have eaten enough food over time and are near each other. The new baby cattle are: 
  • Moolin Calf. 
  • Bambuck Kid. 
  • Strolly Poly Nymph. 
  • Kelple Hatchling. 
  • Materializer. An object acquired from the new event that allows the player to “weave free matter into a temporary living being”. Find it to discover what that means! 
  • A new radiation-themed Merchant that sells new unique items. The merchant may sell an important item for the new boss! 
  • New tools:  
  • Roofing Gadget. Allows the player to either create roof tiles to block light or break a hole in the ceiling to let light shine down.
  • Hand Drill and Scarlet Hand Drill. Allows the player to move while digging and hits much faster than a mining pick. Has lower durability than a mining pick, however. Can be found in item drops in the world. 
  • Obliteration Ray. Exactly as cool as it sounds. We’ll let you discover this one yourselves!
  • Livestock Workbench. Crafted at the Basic Workbench. Allows crafting of the Feeding Tray and some new items: 
  • Leash. Can be attached to a cattle to make it follow the player. 
  • Cattle Transport Box. Allows the player to pick up cattle, keep them in their inventory, and place them out elsewhere. The box is consumed in the process. 
  • Over 50 new pieces of equipment! We have added a lot of new equipment throughout the whole game. We have, for example, added new equipment drops to all the first three bosses to make them more rewarding to defeat. There are also many new equipment pieces that drop from destructibles, enemies, chests, and so on in most biomes. 
  • 10 new weapons. 
  • Solarite Ore. Can be found in walls and various other ways in the Shimmering Frontier.
  • Gleam Wood. A new type of wood that only grows in the Shimmering Frontier. 
  • 3 new rare materials used for upgrading equipment to higher item levels that are found in various ways in the Shimmering Frontier.
  • Jungle Emerald. 
  • Ocean Sapphire. 
  • Desert Ruby. 
  • 2 new plants: 
  • Sunrice. 
  • Lunacorn. 
  • 5 new fish that can be caught in the Shimmering Frontier. 
  • 2 new cooked food types. 
  • 1 new potion sold by the new merchant. 
  • Solarite Workbench with some new tools and base building options. 
  • Solarite Anvil with new equipment and weapons. 
  • New pet: Prince Slime. Drops from King Slime. 
  • 3 new critters found in the new biome. 
  • 10 new valuables. 
  • 4 new figurines. 
  • Over 40 new objects that can be crafted or found to be used in base building and decoration. 
  • A new Wooden Spike Trap can be crafted in Basic Workbench to give players an option for early defense of their base. 
  • 6 new achievements. 
  • 6 new hairstyles. 
  • Meadow ground can now be used for seed planting and gardening.  

Other: 


  • An item level is now shown on equipment, weapons, and many tools. The item level is an indicator of how powerful the item is, and item levels can be upgraded at the new Upgrade Station. 
  • Your character will now call out a message to indicate when you are hitting indestructible objects, objects immune to damage, or objects that will take a long time to destroy.
  • Red Slime Blobs will now sometimes find their way to players. 
  • Regular and Red Slime Blobs will no longer damage cattle. 
  • Renamed Land Kelp, Potted Land Kelp, and Tall Land Kelp to Land Algae, Potted Land Algae, Tall Land Algae. 
  • Improved portal charging text to make it clear that the player only has to wait. 
  • Changed the text for some of the lanterns to make it clear that they’re not equipped in the offhand slot. 
  • Melee weapons can now hit plants, bushes, and tall grass. 
  • Increased the quantity of bombs when dropped as loot. 

Graphics: 


  • Implemented a new water shader. 
  • Implemented water wave/foam simulation. 
  • Improved shading for 3D geometry (ground + wall tiles). 
  • Improved Ambient Occlusion on Medium/High settings by taking directional light information into account. This makes AO appear less “muddy” in areas with strong directional, indirect lighting and should improve overall visual quality. 
  • Added new Caveling Brute emote animations. 
  • Adjusted the party hats position on the head to better suit all hairstyles. 
  • Adjusted destroy particles for certain objects. 
  • Added destroy particles to some objects that previously were missing them. 
  • Figurines that cannot be put into the new Materializer object now have differently colored bases. 
  • Additional audiovisual feedback for certain buttons in the character-creation screen. 
  • Tweaked the shadow position for torches. 
  • Adjusted the effects for explosive deposits. 
  • Improved healing effect for enemies & bosses. 

Audio: 


  • Goats will now make random “baah” sounds. 
  • Adjusted the audio for jellyfish destructibles. 
  • Improved sfx for when a locked chest appears. 

Balancing: 


  • Slightly reduced inertia of boats making them a bit faster when turning around. 
  • Stats on several equipment and weapons have been slightly rebalanced. 
  • The maze that contains the Clear Gemstone can now spawn up to three times in the world to match the amount of Chipped Blades that can be found. 
  • Reduced the amount of enemies that spawn in groups in multiplayer. 
  • Enemies can generally no longer destroy defensive base building options such as doors, fences, and crafted walls. Previously, this was based on tiers of enemies and base building options, but this has been simplified to avoid having to rebuild all walls and doors in a base for the purpose of defense. The different base building options are now mainly intended for just decorative differences. 
  • Slightly reduced the slowness from the Encumbering presence talent. 
  • Reduced the health of Omoroth's tentacles. The tentacles now also despawn after a longer duration. 

Performance: 


  • Procedural generation of dungeons is now spread over multiple frames. This reduces stuttering when exploring new parts of the world. 
  • Sharing maps using the cartography table now only transmits map sections that changed since last time the table was used. This reduces the bandwidth requirements and the time delay before the updated map is visible. 
  • Various performance improvements throughout the code base. 

Bug fixes: 


  • Fixed a bug where equipment set bonuses like the King Slime set and the Larva equipment set would impact factions in the wrong way. The intention was only to become friends with Slimes and Larvae. which has now been fixed. Previously, the player would also become friends with allies of the Slimes and Larvae.
  • Fixed a bug where salvaging items without durability, most notably jewelry, did not give back any raw materials. 
  • Fixed a bug where some seed types could drop distinct variations that would behave identically but not stack with each other. 
  • Clicking item slots in the inventory while traveling in a minecart will no longer sometimes select the wrong slot. 
  • Fixed an issue where locked chests would not spawn when mining with Sledges. 
  • Fixed an issue where objects destroyed by a Sledge would not be automatically pulled to the player if the player was too far away from the destroyed tile or object. 
  • Fixed a bug where the damage buff from consuming cooked Tornis Kingfish was not indicated with a UI icon. 
  • Pets no longer collide with other creatures. 
  • Fixed a bug where deleting user-placed map markers would sometimes delete the wrong markers. 
  • Fixed a bug where rotated Glass Smelters didn’t have an outline when selected. 
  • Fixed an issue where the sound effect for a charged-up weapon would not play for other players. 
  • Fixed a commonly reported issue where the great wall would reappear when the game was restarted.
  • Fixed the value in some buff texts to not have a negative sign, as the description of the buff already indicated it as being a negative effect.
  • Fixed a bug where lava would spread over regular water instead of creating solidified lava ground.
  • Fixed mod checks on connect not working properly.
  • Fixed formating in popup message when missing a required mod.
  • Fixed missing mod name in popup when missing a required mod.
  • Various performance improvements throughout the code base.
  • Fixed a memory leak when there were too many wall particles on screen.
  • Fixed a number of visual errors in the in-game Mod UI.
  • Various performance improvements throughout the code base.
  • Fixed bug hindering a mod from loading assemblies.
  • Fixed unresponsive UI when using characters not present in the Korean font.

Get 33% off of Core Keeper in the Fireshine Games Publisher Sale!

With the launch of our brand-new Mod SDK and our next major update just over a week away, now is the perfect time to start your underground adventure in the world of Core Keeper! Especially since we’re currently part of the Fireshine Games publisher sale, meaning that you can pick up the game at a whopping 33% discount.

If someone you know has been waiting for the right time to try out Core Keeper, then they won’t want to miss our biggest sale to date, so tell your friends! Head on over to our Steam store page to take advantage of this offer now, but hurry, this discount ends on October 9th.



Whether you prefer playing single-player or in groups of up to 8, the mysterious world of Core Keeper is waiting for you and your pals! Will you focus on levelling up your skills or building the perfect base? Perhaps you’ll spend all your time on a tour of the underground! Will you pick a range of backgrounds for a balanced party or maybe build a team of all fighters for the ultimate boss-battling adventure?! With a seemingly endless world to explore, it’s always a good idea to recruit a friend or two to lend a hand.

Check out our latest trailer below for an idea of what you can expect in our next update (coming October 4th). Make sure you’re following us on Twitter for all the latest news and announcements and join the Core Keeper community over on Discord.

Hotfix 0.6.3.3


  • Fixed crash when saving newly spawned objects.
  • Fixed a crash when firing a projectile after switching between two worlds without restarting the game.

Hotfix 0.6.3.2


  • Fixed a bug where water wells and the wash basin didn’t refill watering cans.
  • Fixed a bug where electrical doors didn’t rotate to match the surrounding walls.
  • Fixed an issue where the player might be ejected from a vehicle if they tried to enter right after placing it.
  • Fixed a crash caused by having too many objects on screen simultaneously.
  • Fixed an issue where the game would start even if crucial initialization steps failed, causing unpredictable behaviour and crashes.
  • Fixed graphical effects that were missing for some attack animations.

Hotfix 0.6.3.1


  • Fixed a bug that prevented glass shaders from rendering
  • Fixed wrong material used for modded SpriteRenderers
  • Visual fixes to in-game Mod menu
  • Fixed error in particle shader

Shimmering Frontier Date & Mod SDK Out Now!

Introducing the Shimmering Frontier (previously known as the Crystal Biome), a glistening and glimmering new update coming to Core Keeper on October 4th 2023! Plus, Core Keeper’s Mod Software Development Kit launches today!



A Shiny New Update: The Shimmering Frontier



Set out on a voyage to this long-anticipated biome that’s been on the Core Keeper roadmap since day one. It’s time to explore the Shimmering Frontier, coming October 4th!

Uncover dazzling Solarite Ore to craft all-new armour, tools, and equipment to enhance your underground adventure. But be careful, the Shimmering Frontier isn’t without its perils and you might just find yourself face to face with new enemies – from crystal-mimicking Mimites all the way to Giant Snails.

We’re sure you’ll want to spend plenty of time exploring this new biome, but we’ve also added a whole host of new content throughout the game. You’ll definitely want to search the Shimmering Frontier and travel back through previous biomes to uncover over 50 new pieces of armour and equipment as well as new custom scenes, cattle, pets, boss drops, and more! Just make sure you keep your wits about you in the Sunken Sea, rumour has it there’s something scary stalking the depths of the ocean…and we’re not talking about Omoroth!



There’ll be plenty of opportunities to put your combat skills to the test in this update thanks to exciting new battle events. We’d definitely recommend improving your gear at the new Upgrade Station before you go seeking out one of our unique battle arenas, however! Don’t want to find yourself in a sticky situation with under-levelled equipment (yep, there’s equipment levelling now), do you?

We’ve got plenty in store for fans of the cozy side of Core Keeper too. Shed a little light on your creations with our brand-new Roofing Gadget tool that can bust through and repair the ceiling above to let in or shut out beams of light. Set out to find and collect all new valuables to display in your bases, which can shimmer and shine thanks to new Gleam Wood base-building options. You can even mine out huge areas of the map for all your base-creation needs using the Obliteration Ray. Oh, and expect even more hairstyles for a little extra player customisation!



Developing the Shimmering Frontier has been an amazing journey for us at Pugstorm. You might remember this one as the ‘Crystal Update’ that we announced all the way back in our first Early Access roadmap, and we know that this is the one you’ve all been waiting for. This update went through plenty of designs and iterations, carefully balancing community-requested features, heaps of new content, and references to the game’s lore until we felt like it was just right!” - Sven Thole, Pugstorm COO.

We’re so excited for you to play this update and we’ve barely scratched the surface of what’s to come! With just two weeks to go, we hope you’re looking forward to the Shimmering Frontier as much as we are – coming October 4th!



Our Mod SDK Is Out Now!



As of right now, Core Keeper is offering official mod support through our very own Mod Software Development Kit!

We announced our plans for the Mod SDK way back in June and quickly got to work collating feedback from our very active modding community. We asked you questions about the functionalities you’d like to see, the pain points you were currently experiencing when developing mods, and your preferences when it came to mod creation.

All this led us to the very first iteration of our Mod SDK, which functions via Unity and can be downloaded here. We’ve also implemented an in-game solution that will allow players to browse and install Core Keeper mods from Mod.io directly to the game. We look forward to developing the Mod SDK further, and your feedback will be incredibly helpful for future iterations of this software development kit!



What Is Mod.io?



Mod.io is a mod-support platform that offers players the ability to install mods directly from in-game menus. Mod.io supports small and large (up to 8 GB) mods that are hosted on the Mod.io website, work across all platforms, and are simple for players to implement.

What About Multiplayer?



With the Mod SDK opening up the world of Core Keeper mods to even more Explorers, you might be wondering what this means for multiplayer. In short, this will depend upon the type of mods that have been installed in the world you want to join. Some mods don’t require you, the player, to have them installed so long as the host does. Others may require both the host and the player to have them installed in order for you to play in the same world.

If you join a world with mods that require installation from both the host and the player, you will be given the option to install them too. If you would prefer not to install the necessary mods, the connection will simply close and you will be unable to join that specific world.

We’re very happy to be able to provide creators and players with a stable and standardised platform for mod creation and installation, and we can’t wait to see what you make! Oh, and as a reminder, we do have an official space for mod creators to chat in our Core Keeper Discord server if you’re looking to connect with your fellow modders.