THE EXPLORER'S FIELD GUIDE
Find your next step underground. Practical routes through boss fights, crafting and the everyday work of building a better base.
A WAY FORWARD
Start a new Core Keeper world, upgrade through copper and tin, and activate the Core with the three required boss items.
FOLLOW THE STORYFollow the required Core items, Titan shrine and summoning routes, Hydra material dependencies, and optional late-game fights.
BUILD SOMETHINGStart with a Crude Drill, connect power, orient belts and Robot Arms, and diagnose ore that misses the chest or furnace.
FIND A RESOURCEUnlock Azeos' Wilderness, mine Scarlet Ore, identify boulders for drilling, and use the correct kiln for Scarlet Bars.
UNDERGROUND REFERENCE
Your first base, the world map and playing together.
Core items, Titan shrines and the next fight.
Find the materials. Make equipment that fits.
Bring merchants home and put machines to work.
Food, fishing, companions and cattle.
WELCOME TO THE CAVERN
Core Keeper is a mining sandbox adventure from Pugstorm. Explore, craft and build alone or with up to eight players on PC, then take on the bosses guarding the way forward.
This Wiki focuses on practical PC routes. Check each guide's conditions for settings and older worlds.
Core Keeper supports cross-store multiplayer between Steam, Epic, GOG and Microsoft Store on PC. PC-to-console crossplay is not supported. PS4/PS5 and Xbox One/Xbox Series support play within their respective console families.
Crossplay support follows the publisher FAQ and developer guidance reviewed on 11 October 2026. This page does not claim a tested live session.
Crossplay & co-opBuild an enclosed room with a door and 4–64 interior floor tiles. Give each merchant a separate crafted Bed, leave at least one fully empty tile, and place the correct summoning item on the floor. The Spirit Merchant uses the Ancient Hologram Pod instead.
This setup includes a door and avoids the unresolved minimum doorless-room case. Interior floor area is used, not the outside wall footprint.
Merchant roomsFind Scarlet Ore in the Grass Walls of Azeos' Wilderness beyond the Great Wall. Mine it, then use a Smelter Kiln to make Scarlet Bars. An early Furnace is not the correct smelting station.
PC-focused guidance. Exact values may differ by version, difficulty and world type.
Scarlet Ore