In the previews, Larian has mentioned that if two player characters come into conflict, but peace is restored they can agree to enter into a pact.
What is unclear are the consequences for breaking such a pact. Swen said in the Devline that he'd like to hear from the community about ideas for that.
Okay, here's a few ideas I have. What about you?
Pact of Wealth: Break the pact, and X amount of gold is taken from the pact-breaker. You can't get around this by dropping it first, because until the debt is paid off, any gold which enters your inventory will be automatically whisked away to the victim's inventory until the debt is paid off.
Pact of Blood: Attack the victim and your own health suffers an immediate hit, and the life is transferred to the victim, up until X amount of damage is paid off.
Pact of Power: You get a condition where your primary attributes all suffer a -2 penalty until you make amends.
Pact of Pain: You absorb X amount of damage that would have been done to the victim (no matter what the source of the damage is) until the "pain debt" is paid off.