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"The Devil's Brood" is intended to be a rules-light game, mostly consisting of social interaction.  However, a few rules are necessary.


Physical violence is handled abstractly, using paper-scissors-rock and acting out the results. Some characters are great knights, and automatically win ties against anyone who is not also a great knight.  Some are poor knights, and automatically lose ties against anyone who is not similarly disadvantaged.  In all other cases ties go in favour of the defender.

The winner physically defeats the loser in whatever way is dramatically appropriate and has them at their mercy.  Should the winner wish to actually kill their victim, they must defeat them again.  Note that killing anyone will result in excommunication and disinheritance.


No actual wars will be fought during the game.  However, the question of who would win a war, should one be fought, is likely to arise as the characters manoeuvre for advantage.  This is handled abstractly.  The two kings, Henry and Philip, are worth 5 points each.  Richard is worth 3, Geoffrey 2, and John 1.  Add up the points for the opposing sides.  If one side has one and a half times more points than the other, it wins.  Otherwise, the war will result in stalemate.

Example: Richard considers rebelling against his father.  He has 3 points, Henry has 5. Richard's force is smaller, so he cannot defeat Henry.  Henry has 50% more than Richard (3 x 1.5 = 4.5, rounded up to 5), so he will win.  Unless Richard has allies, his rebellion will fail.

 The Succession

Henry must choose who to give his lands and titles to when he dies.  Lands held by him - the Kingdom of England, Duchy of Normandy, and Counties of Maine, Touraine, and Anjou - can be assigned freely.  He may also wish to reassign lands already granted to his sons - Aquitaine and Ireland - but this requires their consent (John for Ireland, and either Eleanor or Richard for Aquitaine)


Any character who holds land can swear fealty to another, in public or in private.  This has no mechanical effect, but may alter people's military calculations.


If unmarried characters wish to marry, please inform the GM.  The GM will adopt the role of a Bishop and perform a ceremony.




Married characters may wish to have their marriage annulled. This is normally a long process, requiring petitioning the Pope, but has been included for dramatic effect.  Annulment requires just cause, such as consanguinity (being related) or adultery, and the consent of both parties.  The marriage is declared void from the beginning, which means that any children are illegitimate and unable to inherit.  The former spouses keep whatever lands they brought to the marriage.  Characters seeking an annulment should inform the GM, who will adopt the role of a Bishop as required.


"The Devil's Brood" was designed on Larpwriter, a website to simplify the creation of murder parties and larps (know more).

You can also download it in PDF.