House Rule

A HouseRule is a change to the rules of a game, specific to a certain group of players.

Some HouseRules become so popular that they become acknowledged as game variants.

HouseRules can occur in all games - once, before a chess game, I was asked if we played with EnPassant. -- OleAndersen

Example: When rolling a d20 to hit, on a natural 1 you "fumble your weapon", lose combat advantage, and grant combat advantage to your adversary. That's not in the D&D book(s), but it's a very common HouseRule

It is a useful HouseRule on this wiki not to assume knowledge on the part of the reader by making a reference which is only meaningful to those in the know.

See SelfModifyingGame