The fears
In the TMA universe there are these things called fears. There's 14 of them (technically 15) and at least one of these entities are present in every episode of TMA. Since I didn't even finish season 2 yet I might be wrong about what they are or who they are but I do know what each of them mean:
The Slaughter

The fear of pure, unpredictable, unmotivated violence. The fear of pain coming at sudden, random moments.
My favourite episode with this fear: Mag 7: The piper
The Desolation

The fear of pain, loss, burning, and destruction, especially with a senseless cause.
My favourite episode with this fear: Mag 12: First aid
The Flesh

Born from the fear held by animals bred for meat, and in the human realisation that we are just animated meat and bones.
My favourite episode with this fear: Mag 30: Killing floor
The Hunt

The animalistic fear of being chased or hunted; the primal fear of being prey.
My favourite episode with this fear: Mag 31: First hunt
The Corruption

The fear of corruption, disease, filth. Fear of the feelings of disgust, revulsion and the things or beings that might evoke such feelings
My favourite episode with this fear: Mag 45: Blood bag
The Eye

The fear of being watched, exposed, followed, having secrets exposed. Can also pertain to the drive to know and understand, even if your discoveries might destroy you.
My favourite episode with this fear: ???
The Buried

The fear of small spaces, suffocating, drowning, being buried alive. Fear of everything crashing down around/on oneself. Fear of being trapped without enough space.
My favourite episode with this fear: Mag 2: Do not open/Mag 15: Lost John's Cave
The Vast

The fear of heights, falling, and large open spaces including sky, space, and deep water. More broadly: the human fear of insignificance and meaninglessness, of losing oneself in too much space.
My favourite episode with this fear: ???
The Lonely

The fear of isolation, of being completely cut off and alone or disconnected from the rest of society.
My favourite episode with this fear: ???
The Dark

The primal fear of the dark, of the unseen, and the creatures hiding from our view.
My favourite episode with this fear: ???
The End

The fear of death itself uncaring and unstoppable, the fear that everything ends eventually.
My favourite episode with this fear: ???
The Web

The fear of being controlled or trapped, especially being unaware of one's own entrapment. The fear of being forced to do things against one's own will, of being manipulated. Also the fear of spiders.
My favourite episode with this fear: ???
The Stranger

The fear of the unknown, the uncanny, the unfamiliar. The creeping sense that something is not right.
My favourite episode with this fear: ???
The Spiral

The fear of madness, that the world you know is wrong, that your mind is lying to you. Fear of deception, lying, deceiving of the mind and senses.
My favourite episode with this fear: Mag 47: The new door
The Extinction

The fear of catastrophic change, destruction of nature, destruction of human skin and tissue, the destruction of humanity itself and its replacement by something different; all of this especially via mankind's own causing.
My favourite episode with this fear: ???