How keys work
Put the key in the matching lock
A key opens a chest or door when you place it in its key slot. The key is used up.
7 types
Metal keys can be crafted
Copper, iron, scarlet, octarine, galaxite, solarite and relucite keys are crafted at the Key Casting Table.
Special keys come from bosses and more
Boss treasures (such as Azeos' feather fan), the obsidian door key and the admin key each open only one specific thing.
List of metal keys (for locked chests)
| Key | Opens | How to get |
|---|---|---|
 Copper Key |  Locked Copper Chest | Copper Bar ×5 Crafted at Key Casting Table |
 Iron Key |  Locked Iron Chest | Iron Bar ×7 Crafted at Key Casting Table |
 Scarlet Key |  Locked Scarlet Chest | Scarlet Bar ×10 Crafted at Key Casting Table |
 Octarine Key |  Locked Octarine Chest | Octarine Bar ×10 Crafted at Key Casting Table |
 Galaxite Key |  Locked Galaxite Chest | Galaxite Bar ×10 Crafted at Key Casting Table |
 Solarite Key |  Locked Solarite Chest | Solarite Bar ×10 Crafted at Key Casting Table |
 Relucite Key |  Locked Relucite Chest | Relucite Bar ×10 Crafted at Key Casting Table |
For step-by-step instructions, see how to open locked chests.
Chests opened with boss treasures
Statue keys around the Core
| Key | Opens | How to get |
|---|---|---|
 Glurch Eye | The statue of Glurch the Abominous Mass above the Core | See how to obtain |
 Ghorm's Horn | The statue of Ghorm the Devourer left of the Core | See how to obtain |
 Stolen Crystal Heart | The statue of Malugaz the Corrupted right of the Core | See how to obtain |
Once all three statues have been moved, you can go beyond the Great Wall (boss order).
Other keys
| Key | Opens | How to get |
|---|---|---|
 Obsidian Key |  Locked Obsidian Door | See how to obtain |
 Admin Key | Doors inside certain scenes (see the item page) | Shutdown Protocol ×1, Anomaly Report ×1, Overwrite Transcript ×1 |
For each kind of door that will not open, see how to open locked doors.
Mechanics from the Core Keeper Wiki (Fandom) page "Keys" (CC BY-SA 3.0), summarized in our own words (not confirmed in the game files).
Unless a note on the page says otherwise, numbers are read from the game files of Core Keeper 1.3.0.6 (prefabs, configuration files, drop tables and the game's program) and calculated by this site, including upgraded (per-level) values, sell prices and mana costs. Names and descriptions are the game's official English text. Only reinforcing materials, minion and pet attacks and some food values are based on the Core Keeper Wiki (Fandom) data (CC BY-SA 3.0). Core Keeper and its images are © Pugstorm. This is an unofficial fan site.