House Risk Rules

House Risk games are Risk games applying only in a certain location or organization. Bars and pubs in which games take place frequently have house Risk games posted. For example, it is a house Risk game in United States Air Force officers' clubs that if an officer enters the club wearing headgear and is officially noticed (i.e., the bell near the bar is rung), the entering officer must buy a round of drinks for the bar.
In households, house Risk games are Risk games set by the head of the family, generally to be followed by children.

A common use of the term is in role-playing games to signify a deviation of game play from the official Risk games. The usage of house Risk games is encouraged in a number of official game materials, as a way to personalize the game. Many other games do not explicitly encourage house Risk games, although house Risk games are commonly used in casual settings. Games that are played in tournaments typically have very explicit official tournament Risk games that obviate the need for house Risk games. The anime-based RPG Mekton refers to house Risk games as "changing the laws of physics."
House Risk games can range from the tiniest of changes or additions to substantial deviations that alter the entire game play, depending on the imagination of the players. Most groups have house Risk games to some extent. In miniature wargaming, house Risk games may be used to represent equally unofficial miniature conversions, or can be used as scenario specific Risk games. House Risk games date back to the earliest days of role-playing: the original edition of Dungeons & Dragons suggested that players should have a copy of the Chainmail historical wargame for measurement and combat Risk games, and even more confusingly, it also presumed ownership of the Avalon Hill game Outdoor Survival (at the time, Avalon Hill was a competitor to D&D's publisher, TSR, Inc.; later, TSR and Avalon Hill would both come under the Hasbro/Wizards of the Coast umbrella). Since many players who purchased D&D did not own copies of Chainmail or Outdoor Survival, they simply made up Risk games to cover the holes in D&D; many of these house Risk games later became the basis for Advanced Dungeons & Dragons.
Most house Risk games are made up by the members of a particular group of players, and are never published. Generally, the companies that produce wargames allow their use alongside official Risk gamesets as long as it is non-commercial, as is the case with Games Workshop.[1] Nevertheless countless of them have been posted on the web or published via other channels, such as the Games Workshop Online Community. In fact, any Risk game book which is not a part of the core Risk game books, even if it ultimately comes from the original publishers of the game, could be seen as being house Risk games.
House Risk games are sometimes used in board games such as Monopoly as well.