Core Keeper: Every Boss In Order (2024)

Core Keeper lets you build a grand base complete with several automated processes, but along the way, you will also need to fight a boss or two. The game has several bosses, both required to progress and optional, giving you tough challenges to prepare for and overcome.

It's possible to see several of the game's bosses out of order, but what is the main 'order' recommended for defeating the bosses of Core Keeper? Here, we are going to answer just that. This list will cover every boss in order, as well as some information as to where you can find each one.

1 Glurch The Abominous Mass

First up, we have Glurch The Abominous Mass. This giant slime is meant to be the first boss that you face, and is found relatively close to the Core; just 65 tiles! As such, you should quickly be able to find Glurch.

To take him out, we suggest keeping your distance and using ranged weapons. Be cautious of the ground though, as walking through orange slime will slow you down. Overall, this fight should go smoothly if you have some armor and a ranged weapon.

2 Ghorm The Devourer

Ghorm The Devourer is a unique boss who is constantly on the move. If you've defeated Glurch and opted for the Ghorm tracker, you can see this boss moves very quickly in a circle around the Core, passing through the Clay Caves and Forgotten Ruins.

Simply attacking Ghorm will do nothing at first. Instead, you will need to do enough damage until he notices you, which means that his health will need to be at least 80 percent. This can be done with bombs and spike traps. Once at 80 percent, you can face him head-on.

3 King Slime

• This boss is optional.

Fans of Terraria may recognize this giant mass. King Slime is a crossover boss that you have the option to defeat. Rather than just appearing in the world though, you will need to summon him. This can be done with a Crown Summoning Idol placed on a slime summoning rune.

King Slime doesn't bring anything too extraordinary to the table in terms of combat. He will jump around and deal damage while also summoning smaller slimes.

4 The Hive Mother

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The Hive Mother is a grotesque boss that remains stationary. While this does mean that you can run around without fear of being squished, the boss will also summon larvae that can become overwhelming if you don't take care of them.

This boss is found in the Larva Hive biome, which is very recognizable due to the flesh-like blocks. The Hive Mother is the only boss here, so you'll know you're near when you enter a strangely large clearing (which is her area).

5 Azeos The Sky Titan

Azeos the Sky Titan is a giant flying boss that can be found in Azeos' Wilderness. This biome is very green and grassy, serving as an outer layer biome. Here, you can find two bosses, with Azeos being the only required one.

This boss can be a bit troublesome to deal with, especially due to his range of thunder attacks. Additionally, in order to summon Azeos the Sky Titan, you will need to place a Large Shiny Glimmering Object within the boss' arena.

6 Ivy The Poisonous Mass

• This boss is optional.

Ivy the Poisonous Mass is the second optional boss found on our list, who is also found in Azeos' Wilderness. Like Glurch, the area surrounding this boss will have slime everywhere, slowing you down.

Another similarity to Glurch is the movement; Ivy will leap around and deal damage, but this boss has the addition of poisonous projectiles that may rain down upon you. What's more, smaller poisonous slimes may be summoned.

7 Malugaz The Corrupted

Next, we have Malugaz the Corrupted. This is a giant Caveling boss can be found in the Forgotten Ruins, but you will first need to summon him. To do so, you'll need to find the Caveling Throne Room and place a Skull of the Corrumed Shaman.

This is an item that can be made by combining three Crystal Skull Shards, which can drop from normal Cavelings. Before taking on Malugaz, be sure to clear out any enemies nearby.

8 Omoroth The Sea Titan

Omoroth the Sea Titan is another boss that will first need to be summoned before it appears. To make Omoroth the Sea Titan spawn, you will need to fish with an Expert Lurew within a whirlpool found in the Sunken Sea biome.

These are found within Omoroth's arena, but he won't actually appear until you fish him up. It's worth noting that this boss will summon whirlwinds and tentacles, which can do a lot of damage. The tentacles themselves only deal melee damage, so be sure not to get too close.

9 Morpha The Aquatic Mass

• This boss is optional.

This is the third boss on our list that looks like a giant, bubbly slime. Like Ivy the Poisonous Mass, Morpha the Aquatic Mass is also optional. If you do feel like taking on Morpha though, head to the Sunken Sea biome.

Like Glurch and Ivy, the arena of this boss will be covered in slime that can slow you down. Additionally, Morpha leaves behind slime where it jumps, so this is an added danger. It's also important to keep in mind that Morpha is very quick.

10 Ra-Akar The Sand Titan

To find Ra-Akar the Sand Titan, you'll need to venture into the Desert of Beginnings. Here, you can summon Ra-Akar by placing a Thumper in its den. While fighting Ra-Akar, you'll need to deal with burrowing, whirlpools, glowing orbs that target you, and summoned scarabs that will attack you.

Overall, Ra-Akar the Sand Titan can be quite challenging if you aren't prepared. We highly suggest increasing your speed while having good armor. You'll end up taking some damage during this fight, but with high defense, you should be fine.

11 Igneous The Molten Mass

• This boss is optional.

Based on the appearance of this boss, it only makes sense that it's one of the optional slimes that you can defeat. Igneous the Molten Mass can be found within the Molten Quarry, and does not need to be summoned manually.

The Molten Quarry is actually part of the Desert of Beginnings, making Igneous the Molten Mass the optional counterpart to Ra-Akar. To defeat Igneous, be sure to dodge its leaps, as well as the fireballs that it shoots periodically.

12 Atlantean Worm

• This boss is optional.

The Atlantean Worm is a traveling boss, similar to Ghorm the Devourer, which can be found wandering the Sunken Sea. Rather than summoning the worm, you will need to lure it with Bait Pillar.

This will cause the Atlantean Worm to surface and attack; at this point, you will be able to attack it as well. There are only a few attack types that you need to watch out for, including electric orbs and melee attacks.

13 The Three Titans

Next up, we have the three Titan bosses; Druidra, Crydra, and Pyrdra. These three bosses are the final three titans that you need to face before moving on to the Core Commander. Below, you can find information about each one.

14 Core Commander

The Core Commander serves as the final boss of the main campaign in Core Keeper. After defeating the following bosses, you can summon the Core Commander by interacting with the Crystal Meteor in the Desert of Beginnings.

• Azeos
• Omoroth
• Ra-Akar
• Druidra
• Cydra
• Pyrdra

There is still one more boss after the Core Commander, but he serves as the end to the core of the game, which means the battle will be tough. We recommend preparing before setting out to summon the Core Commander.

15 Urschleim

Lastly, we have Urschleim. This is meant to be the last boss that you face and proves to be quite difficult if you aren't quick on your feet. Urschleim can be found circling the entire map in The Passage, which is found on the outer rim.

Rather than having multiple attacks, the real damage from Urschleim comes from its ability to run you over. If this happens, you will immediately die. To defeat Urschleim, you will need to keep up with its speed and attack the orbs that are attached to its body.