See Setting Approval for PCs for more details.
Mental Disorder Conditions are a specific subset of character concept Conditions that fall under the guidelines of restricted conditions. These disorders (in layman's terms) are not an exhaustive list, and like any Condition a new disorder may be reviewed under the Guidelines to see if it needs to be restricted.
Why We Do This
Mental disorders are tricky to play well in any setting. We have understanding and consideration for those who have these conditions in real life. This is not intended to pass judgement on those who have these disorders. But for the game settings, we need to make note of disorders that are particularly disruptive in a roleplaying context. See Setting Approval for Conditions for details.
It it worth noting that when you play one of these characters you need to be playing them because you want to play the *character*. Tossing a character into the situation "just to mess with other players" or "just for the lulz" is griefing. Play the character for yourself - other players are not there to be your experimental lab. If we suspect you are playing a character with these conditions in order to grief - your approval for the character will be revoked.
Example Mental Disorders
This is not an exhaustive list. New disorders may be reviewed and added to the list. This list is in "layman's terms". Some of these disorders may not be accurately named or even exist medically. We only list these disorders as used in a roleplaying context.
Sociopathy / Psychopathy
Same problem different levels of aggression vs thought. Dexter. Hannibal Lector. Etc etc. The problem here is a an issue of degree. This is like "playing an evil character" dialed to 11. Players with characters that have these conditions sometimes will use "the character did it not me" as an excuse to avoid the OOC reactions of other players whose characters have been hurt. While we don't want the OOC to influence the IC, never forget that you are playing in the context of a game with people who are supposedly your friends. You don't want to hurt real life people.
The vast majority of characters, or at least fantasy characters, would be considered serial or mass murderers, thieves and possibly war profiteers. There's a level of 'acceptable play' that comes with the territory - so this isn't about calling out someone on their specific instances of play. For the psychopaths / sociopaths conditions we're looking at the self-identified concepts only. Basically the "I want to play a serial killer and run around wearing a woman-skin" sort of concepts. For example: Dexter or Hannibal Lecter.
In the wrong hands, this can be an invitation to griefing and extremely disruptive to play.
Prerequisites to Play
Before a character with this sub-type of Mental Disorder is approved for play, the player will need to pass the Social Walkthrough. The player will also need be up-to-date on the consent standards on site before playing this concept.
Amnesiacs can be a lot of fun, but the problem is it can be really disruptive to the rest of the players. There's a 'everyone pay attention to meeeeeee' tendency that can pop up with these. It can be very spotlight grabby as the amnesiac constantly tries to turn the scene towards their situation and history.
Secondly, this can be used as a way to sneak a backplot for a character in during play where it wouldn't have gotten Setting approval. For example: If we approve an amnesiac mage, only to find out the player is 'recovering the memories of having been a king' in his casual RP when we would never have approved a king in the first place - then that's a problem.
Amnesiacs should write down what they remember, and what they don't remember but have already set for themselves before play. And after play, it's an open field for the A/SHs to set the things you haven't set.
There's no take-backsies here. If you didn't put it in the background before - you can't arbitrarily add a major background element afterwards. That wasn't the character we approved for play, which raises the third issue, this can be a lot of work dumped in the laps of our A/SHs. We just might not have enough time to really help develop the background so it can be disappointing to the player.
Prerequisites to Play
Before a character with this sub-type of Mental Disorder is approved for play, the player will need to provide us a backstory even if the character does not know the details. Any significant gaps in missing memory not already filled in before approval cannot be back-filled by the player afterwards. Gaps are left to the A/SH's to fill after approval.
Multiple Personality Disorder
Like a cross between Sociopathy / Psychopathy and Amnesia. This one is often used as just a wild collection of 'weird shit'. Depending on the character's personality at the time they may work in a session. But it can be extremely disruptive in casual play to the point of making character bonding almost impossible. Sadly, that's most of the play opportunities on this site. There is also the risk that a player may use a MPD condition as an excuse to play any of the other more-or-less troublesome conditions without running it past anyone or warning anyone about it first. So - again, the risk of griefing is high.
Prerequisites to Play
Before a character with this sub-type of Mental Disorder is approved for play, the player will need to provide us descriptions and personalities for each of the personalities of the character. Each will need to be approved individually. Additional personalities cannot be added after approval.
Spontaneous Audio / Visual Hallucinations
There are plenty of diviner concepts that have this and handle it perfectly well, and characters who have been affected by spell or drug can get this too. The concept itself isn't bad. This one is on the list more for logistical reasons. It can be tricky to play in a session without throwing people for a loop, so it can get disruptive and be extremely confusing to play a scene with.
Unlike a tabletop game where the look of confusion on a player's face may get a quick OOC explanation in a text based game that explanation often takes too long to type. This leads to confusion and worry on the part of an A/SH that they've described something poorly, or even other players mistaking a player's described hallucination as an actual thing in the scene. So for this one, we just need to know about it in advance.
Prerequisites to Play
Before a character with this sub-type of Mental Disorder is approved for play, the player will need to give us a list of triggering events that cause the audio or visual hallucinations. The player will also need to be up-to-date on site training to avoid disrupting play with this concept.