Paranoid Disorder

Feelings of constant persecution and mental distress. They may have hallucinations, hear voices that insult or threaten them, and think they are being followed or stalked. They will be wary of new situations, be exceedingly suspicious, and will rarely trust even those around them. Strangers are the most vehemently reacted against.
Acute paranoid disorder includes jealousy and the belief of unfaithfulness or treachery in those close them. The hallucinations become more vivid and when they are attacked or persecuted by the image they will become aggressive and subject to frenzy, or there is an equal chance that they will become subject to terror and enter an apathetic state.

Pathological Liar

As listed in WFRP.

Phobias

The person will suffer anxiety if they see the phobic item, situation, or creature. Typical phobias are…

Claustrophobia: fear of enclosed spaces and/or being trapped, restrained. Acute symptoms may even cover the wearing of helms or being in crowds, and this will bring on anxiety. If they are truly trapped, they will enter terror.

Social phobias: fear of being in certain circumstances, eating in public, meeting strangers and so on. Acute symptoms will lead to terror in these circumstances.

Scotophobia: fear of darkness and of reduced sensory input, again, acute scotophobia leads to the suffering of terror in darkness and anxiety when a light flickers, the sun is setting, or they are otherwise in jeopardy of being plunged into darkness.

Psychopathic Disorder

This is the complete lack of moral or social conscience that can be interpreted as a change of alignment towards evil or chaos. The sufferer lacks any feeling for people they know, and act only on instinct. They take what they want as they want it, make arrangements and plans, but disregard them if they want to without warning or explanation. They are typically acting like children, in that their desires must be instantly sated and pandered to or they become angry, aggressive, belligerent, insulting, and perhaps violent.
Alcohol and/or drug dependence are additional problems that can develop later if it is not treated.

This covers several related illnesses. It is a steady crumbling of the divisions between reality and fantasy. Thought disorder is the key element. The sufferer will develop d2 of the following symptoms, each of which can become acute if left untreated.

Roll d8 Symptom
1 - 2 Auditory hallucinations
3 - 4 Delusion
5 - 6 Thought disorder
7 - 8 Hypochondria

Auditory hallucinations: They may believe that others know their thoughts and may hear these thoughts being spoken, even before they think of them. They may hear a voice describing what they are doing, commenting on their thoughts and actions often in a very critical or threatening manner. Acute cases will believe that an external force is inserting or withdrawing thoughts from their mind and will suspect those around them of being involved. This can lead to violence and self-mutilation.

Delusion: They will have unshakeable conviction that some external force is tampering with their mind and thoughts. The source is generally something like sorcery, Chaos, the suns rays and so on. Sometimes they follow bizarre lines of thought, for example that the red hat a person is wearing is a secret message for the sufferer, and was sent by some insidious organisation. They may also believe themselves to be extremely important, even to the extent of Godhood. They may believe they are being persecuted, and in acute cases, this will lead to violence and them being subject to frenzy as paranoid tendencies take over.

Thought disorder: Going from one subject to another, showing a strange association of ideas, the use of long words that have been made up, and stopping suddenly in mid sentence. A loss of emotion, interest, and enthusiasm are other symptoms. They will find it difficult to make even simple decisions, and sometimes their emotions will be confused, such as being upset when receiving good news. They may start to sleep a lot, and in acute cases, this can lead to a total lack of response to outside stimuli, even though they may be very perceptive of what is going on around them. In some acute cases, they will start to make offensive remarks to visitors and constantly talk to themselves.

Hypochondria: They will believe that the external forces are changing their body, either through mutation, development into a new being, or devolving into something hideous. Acute cases will succumb to suicidal tendencies to evade this fate.