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Core Keeper

Pugstorm, Fireshine Games, bilibili

Explore a vast cavern of creatures, relics and resources in a mining sandbox adventure for 1-8 players. Mine, build, fight, craft and farm to unravel the mystery of the ancient Core.

ActionAdventureIndieRPGSimulation

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About This Game

Awaken as an explorer in a long-forgotten cavern teeming with untold secrets. In this award-winning, 1-8 player mining sandbox adventure, your choices shape an epic journey. Harvest relics and resources, craft advanced tools, build your base, and explore a dynamically evolving world waiting to be unearthed.

Level up your skills, defeat legendary Titans, and unveil the power of the Core. Grow your garden, fish in mysterious waters, master a vast array of recipes, raise and care for animals, encounter the Cavelings, and carve out your own unique world in an enchanting underground adventure.

  • MINE RESOURCES

Delve deep to harvest precious resources and unearth hidden gems. Craft tools to help you survive, from pickaxes, fishing rods, and shovels to traps, bombs, and mortars. Upgrade your arsenal and equipment with advanced tools like the mighty Obliteration Ray, and automated machinery to streamline mining, smelting, storage, and more. Level up your skills and unlock powerful weapons to conquer the depths.

  • DISCOVER AN ANCIENT WORLD

Explore diverse biomes with unique ecosystems and long-forgotten lore. From the living walls of the Clay Caves to the crystal caverns of the Shimmering Frontier, discover more about this mysterious world as you uncover the secrets of the Cavelings. Build a boat to set sail across the Sunken Sea, race across the Desert of Beginnings, and encounter the remnants of ancient civilizations.

  • BUILD, CRAFT & GET CREATIVE

Create a totally unique base using a variety of different materials and customisations. From the ultimate adventurer’s lair to a cozy underground cottage, shape the underground your way. Customize your character’s appearance and choose from an array of powerful armor and unique outfits to suit the moment.

  • BATTLE TITANS

Face legendary Titans that hold the secret to this long-forgotten world. Sharpen your combat skills against a variety of monsters and mini-bosses, spend talent points to level up your abilities, and plan your strategy to conquer these colossal creatures of the underground. Discover rare and powerful loot to help you on your journey and power up the Core.

  • EXPLORE WITH FRIENDS

Enjoy the adventure solo or team up in 2-8 player drop-in/drop-out online co-op. Play your way and explore at your own pace — celebrate the seasons, trade with merchants, hatch your new best friends, design the ultimate base, automate resource gathering, host your own dedicated server, create music on playable instruments and discover an unforgettable sandbox adventure.

Community Activity

  1. Core KeeperSteam patch notes

    CK 1.3.0.6 - Hotfix

    CK 1.3.0.6 - Hotfix Bug Fixes Fixed an issue that would prevent Steam Free Weekend players from entering a world.

  2. Core KeeperSteam announcement
  3. Core KeeperSteam patch notes

    1.3.0.5 - Stability Patch

    1.3.0.5 - Stability Patch Modding Water painted in the ModSDK's custom scene editor now uses its in-game color, making it easier to tell water types apart. Tiles without an icon…

  4. Core KeeperSteam announcement

    Community Wrap-Up - September 2026

    Happy autumn, Explorers 🍂 We hope you're loving our latest update, Riders of the Underground! September has been a busy month for us, but we're so excited to be able to share all…

  5. Core KeeperSteam patch notes

    1.3.0.4 - Hotfix

    1.3.0.4 - Hotfix Bug Fixes Fixed spike traps, drills and certain other hazards not dealing damage. Fixed some traps and other continuous damage sources having a short delay…

  6. Core KeeperSteam patch notes

    1.3.0.3 - Stability Patch

    1.3.0.3 - Stability Patch Gameplay Mounts are no longer permanently removed when attacked by bosses. Game Balance Increased the figurine drop chance for Void Caveling, Void…

  7. Core KeeperSteam patch notes

    CK 1.3.0.2 - Hotfix

    CK 1.3.0.2 - Hotfix Bug Fixes Fixed an issue where drills would cause damage on the first game tick after receiving power. This broke some circuitry builds that rely on drills…

  8. Core KeeperSteam announcement
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