I was creating a soldier/mercenary character, and decided to add flavor to his personality. After consulting fellow veterans and my DM, I crafted the following rules to simulate PTSD. Though I doubt they will change much, I'm open to advice. They will be tweeked by my DM as the campaign progresses.
The character always tries to avoid staying in any location for an extended period of time. He avoids any long term commitments. He also acts aloof and almost belligerent with fellow party member, though this will be less prevalent as he gets better acquainted with said characters. (Making close friends with people who may be killed soon is never a good idea.) He also had triggers that could cause undesirable actions. These triggers were all chosen after afore mentioned consultations. Obviously, other players who try these rules should define their own triggers depending on the characters past events.
Triggers for chart 1 rolls:
>Loud noise without warning. (i.e. gunshots or fireworks)
>Struck by a melee attack during the first round when surprised.
Triggers for chart 2 rolls:
>The combined smells of burning flesh and petroleum.
>Any other event the DM deems appropriate
Chart 1
% Roll : Effect
1-25 : Character is COWERING in fear. Will save required
each round until recovery. (Save DC is 10+1/2 character
level + number of previous failures. Character
automatically returns to normal 1d6+4 minutes after combat
ends)
26-75 : Character acts normally
76-90 : Character is STUNNED for 1 round.
91-100: Character is CONFUSED for 1 round.
Chart 2
% Roll : Effect
1-20 : Character is DAZED for 1 round.
21-80 : Character acts normally.
81-95 : Character is STUNNED for 1 round.
96-100: Character is CONFUSED for 1 round. (Roll twice on the
table in the core rulebook and choose one result.)
Any fellow veterans feel free to tell me where to stick these rules. (Also thank you for your service, Brothers and Sisters.) All others please give constructive criticism or advice. DM's, be advised roleplaying this concept and the associated rules will likely be very difficult.