Snapshot Summary
- The Interloper boss is found in Yelrum, the City of Forgotten Bliss.
- You need to answer questions correctly to open a locked door and access the path to the boss.
- The Interloper boss has several tricky AOE attack movesets, and avoiding them is key to winning the battle.
- Like with every boss, you can get an inspiration ability for beating The Interloper, but you’ll get a Cosmic Ritual if it’s your first time beating him.
Absolum is a game brimming with secrets and challenges, constantly pushing players to experiment with new paths and tactics. Beyond the main narrative, a hidden boss awaits you in the most obscure corner of the world. Defeating this enemy, known as The Interloper, requires not just skill in combat, but also a keen eye for hidden pathways and environmental puzzles.
How to Find and Beat The Interloper in Absolum

The Interloper boss is found in the Mouth of Madness, a secret area in Yelrum, the City of Forgotten Bliss. There are a specific set of steps needed to be done correctly to trigger this area and the boss fight.
- Gain access to Yelrum, the City of Forgotten Bliss. This option appears periodically during a run, often after defeating the Underking.
- Proceed through the entire stage until you reach the final campground.
- At this campground, you’ll find two entrances. Take the steps leading upwards towards a locked gate.
- Approaching the gate and interacting with it will present you with two questions:
- “There are many people, but only one truth. Do you seek it?”
- Answer by gesturing downwards with your controller.
- “Show me that you are one of us.”
- Answer by gesturing upwards with your controller.
- “There are many people, but only one truth. Do you seek it?”
- Once you’re done, the gate will open. Continue straight through approximately four to five segments.
- Defeat the Fullgrown Horror and Twisted Horror bosses. Afterward, proceed to one more campground.
- At this final campground, locate two candles. The candle on the right is obscure and partially hidden; find it and walk towards it. This will take you behind the stage.
- Then, move upwards. The screen will focus, and an outline will become increasingly bright, revealing a doorway. Enter this doorway to enter the Mouth of Madness.
How To Defeat The Interloper
The Interloper is a challenging boss with a lot of AoE attacks and space lasers, along with various tricky maneuvers. While not explicitly stated to have specific weaknesses, focusing on high damage output and efficient mana regeneration builds is the best way to take on this boss.
Here’s what to do for Phase 1:
Moveset | Counter |
---|---|
Laser Summon (Target on the ground, followed by two beams) | Dodge out of the target area. |
Hand Beams (Hands move to the sides and fire lasers, then move back across the area) | Jump over the beams. |
Hand Slam (One hand hovers over your position and slaps down) | Dodge away from the impact point. |
Hand Swipe (One hand swipes close to the ground, palm towards you) | Deflect or Clash the swipe. |
Here’s how to handle Phase 2:
Moveset | Counter |
---|---|
Laser Summon (same as the last phase) | Dodge out of the target areas as they appear. |
Interdimensional Headbutt (Dives into a portal, appears on one side of the area, and charges forward) | Deflect or Clash the charge. |
Cosmic Explosions (Fires cosmic projectiles that create a small AoE upon contact) | Dodge the projectiles and their explosions. |
Head Spin (Puts head on the ground and spins towards you) | Dodge the attack. |
Death From Above (Enters a short invulnerability period and continuously fires lasers) | Dodge the lasers; this phase is followed by summoning two small horrors. |
Tips & What To Watch Out For In Interloper Boss Fight
- Use abilities that allow for quick movement and defensive barriers.
- Utilize inspiration selections that buff attack power, defense and health.
- Ensure you have a second Arcana slot unlocked.
- This is a battle of attrition, do not get greedy with attacks.
- The clash moveset of the boss is the best one to punish immediately after with your strongest attacks.
The Interloper is a great secret that the game hides, and is also a particularly challenging boss that will test all the skills you have built up in the game. The best way to manage the fight is to master your Deflect and Clash mechanics to create openings for huge damage.
FAQs
What Happens If I Don’t Gesture Correctly At The Gate?
If you do not make the right gestures, you will not be allowed through the gate.
Can I Fight The Interloper Multiple Times In One Run?
No, you’re going to have to move on if you fail or beat them.
Are There Any Specific Character Builds Or Arcanas That Are Effective Against The Interloper?
While there’s no specific “best” build you need for The Interloper, if you have invested heavily in permanent upgrades and found characters, you’ll have an easier time. Karl, for example, is very strong when he’s upgraded.
Is This A Missable Boss?
Yes! Like the true ending in Absolum, It is a highly missable boss if you do not do the steps in the exact order mentioned above.