How Do Monsters Move in Amnesia: The Bunker

Many players are very confused and puzzled about how Monster A.I work and that’s fair. We did not uncover the A.I’s code just yet so this guide should help you understand how the Monster works in rough ways (nothing is fully confirmed).


The Monster behaves similarly to the Alien: Isolation. It will react accordingly to the player’s actions such as what noises are they causing and what kind of noises. It is fairly capable to kill players instantly in one hit but may sometimes just wound them instead in some cases.

It can be scared of through various ways but that will only anger it, making it stronger in the end.


The Monster will react to any noise the player will cause at any point throughout the game’s playthrough. There are no scripts, nothing is scripted to force-spawn the Monster, it is completely independent and will behave on its accord.

Before I start explaining; the game’s difficulty matters as it will give certain modifiers in certain difficulty modes that dictate how often a Monster could emerge. Even if you cause the following noises, the Monster might not always emerge when there are active powered lights in the area.

Let’s talk about the noises. I’ll name them two types of noises; Quiet and Loud.
The following are considered quiet noises;
– Cranking up the flashlight.
– Running.
– Tossing objects.
– Tossing empty bottles.
– Flares.
– Destroying doors.
– Slamming doors.

The following are considered loud noises;
– Gunshots.
– Explosions.
– Prisoner yelling.

If a quiet noise is done, the Monster may or may not emerge from a hole. Causing quiet noises will only increase the random chances for the Monster to emerge out and is not a guarantee that it will definitely come out.
For example, running for two seconds is not a guarantee that it will emerge but the more you run, the higher chances it will emerge. The same goes for how many times you crank your flashlight in a row. You only need to crank it twice.

On the other hand, if a loud noise is done, the Monster WILL most likely emerge. So, if you shoot a keychain or whatever, seek a hiding spot. You may hear the Monster crawling into a wall before emerging from a hole.

When either noise is caused and the Monster emerges, they will investigate the source of the noise. Whichever hole they seek to emerge, it’ll be the closest to the source of the noise.
How long the Monster will investigate seems to be dependent on how many and how loud the noises were. If an explosion was caused, it may take up to a minute. If two explosions, it could be two minutes.

In either case, the Monster emerging does not mean they are fully aware of your presence just yet.
When the investigation is completed, the Monster will enter a hole again, making it safe for the player to travel. You may hear the Monster crawling elsewhere.

Certain actions do not seem to cause any noise such as pulling in or out the flashlight and any other item so you are safe to do those.

As mentioned above, if you are playing in EASY mode, the Monster might not emerge at all even if you cause loud noises. In NORMAL mode, the chances are standard. In HARD mode, it’ll likely emerge more frequently and patrol for longer times.


The Bunker is full of holes. Fortunately or unfortunately for you, the Monster uses those holes to emerge and roam freely or investigate noises. They are its main ways to navigate through any part of the Bunker effortlessly. You, in the meantime, have to find keys to unlock doors in order to navigate through the Bunker. You – 0 Monster – 1.

At times, you can hear the Monster crawling through the ceilings and into the walls. You can see dust falling from the ceiling which is usually an indicator that the Monster is crawling or just crawled before it stopped somewhere. Do not confuse the falling dust from the random artilleries that land outside the Bunker.

When a noise is caused, usually quiet ones, the Monster may crawl to the nearest hole where the source noise is caused and stay. When that happens, you’ll see dust coming out from the hole constantly. Walking through an active hole or standing next may result in the Monster snatching you into the hole, killing you instantly. It may sometimes surprise you by emerging out of the hole, injuring you in the process and knocking you out for a moment.

When a hole is active, some nearby lights may start to flicker at a slow pace.

Holes can be blocked with a heavy object. Doing so will prevent the monster from emerging from that hole and will try to emerge from other holes in the vicinity instead.

Lights and Darkness

Having the lights powered on by the generator may decrease the game’s difficulty in some ways and can be a lifesaver. Having the lights off will plummet the entire bunker into pitch darkness which not only makes your navigation in the bunker difficult but it permits the Monster to roam freely for any reason and that’s bad news for you.

With the lights powered on, the Monster will not roam freely in powered areas. Instead, it will remain in the holes. It will, however, emerge if you cause enough noise. When that happens, lights near the monster will start to flick rapidly. This is your cue that the monster is definitely near the spot where the lights flick rapidly. Distant lights will flick slowly. This is why the lights can be a lifesaver because they give away the Monster’s rough position.

With the lights off, the Monster will roam freely at any time for any reason and, sometimes, may not return to holes. Furthermore, it will most likely emerge from holes when a noise is caused in contrast to powered areas where it might not appear at all sometimes.

Using explosions can destroy nearby lights, rendering those areas dark for the Monster to roam freely so be careful.


The Monster can see you at long distances and, when spotted, will stand up on its legs and roar before breaking into pursuit until it catches you up and kills you. There’s no way to avoid its grasp as it can overpower you and kill you.
It may sometimes injure you instead such as emerging from a hole when you are near one.

The Monster will not instantly break into pursuit upon sight. It’ll always roar first before starting a pursuit, giving you enough chances to react and flee or defend yourself.

There are a few ways that you can defend yourself; Shooting at it, using smoke grenades or any explosion. Injuring it will cause it to flee into a hole and leave the area temporarily. However, it will eventually return much angrier than before.
This means that further defenses will not always work against it.
For example, if a single gunshot from a revolver made it flee, you will need up to 3 gunshots from a revolver to make it flee again and so on. The same goes for any other defensive tools.

If the Monster loses sight of you, it will go to the latest spot that the noise was caused (ie. running before you stopped running). It’ll then investigate the immediate vicinity and may break down doors, tables, etc. The Monster is also capable of going through vents as well.
During the investigation, the Monster may stand idle as if it’s trying to listen for any noise you may make (ie. cranking flashlight).

The Monster cannot break down locked metal doors (ie. save room).

This guide about Amnesia: The Bunker was written by »SOD« Thekillergreece. You can visit the original publication from this link. If you have any concerns about this guide, please don't hesitate to reach us here.

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