You cannot use two-handed weapons, wield two weapons at once (or a weapon and a shield), or perform any task that requires two arms. You get -4 on tasks that are possible with one arm but that are usually executed with two.
You must make a self-control roll any time the GM feels you show an unreasonable degree of caution. If you fail, you must go ahead as though you were able to handle the situation!
Make a self-control roll whenever you have an opportunity to indulge your desires and know you shouldn’t (e.g., because the prisoner is one who should be released unharmed). If you fail, you cannot restrain yourself.