Editing Rule Zero (section)

==D&D==
* In [[Dungeons_%26_Dragons#Basic_Dungeons_.26_Dragons|Basic D&D]] in 1980, the book says on the first page:
:''"Anything in this booklet (and other D&D booklets) should be thought of as changeable -- anything, that is, that the [[Golden_Rule|DM thinks]] should be changed... The purpose of these 'rules' is to provide guidelines that enable you to play and have fun, so don't feel absolutely bound to them."''
* In AD&D, the player's handbook has on page 8:
:''"This game is unlike chess in that the rules are not cut and dried. In many places they are guidelines and suggested methods only."''
*Dungeons & Dragons 3e doesn't explicitly state the rules can go hang, but it does have a section for changing the rules to suit your group (DMG, pg 11).
*D&D 3.5  states in several places that the DM can treat any rule as a mere suggestion at any time. Examples: bottom of page 64, Player's Handbook (Access to Skills), and most directly in the DMG on page 6: "Good players will always recognize that you have ultimate authority over the game mechanics, even superseding something in a rulebook."
*D&D 4e also has a section on creating house rules (DMG, pg 189).
*D&D 5e talks about adding optional rules and how the rules are "guidelines" in Chapter 9: Dungeon Master's Workshop (DMG, pg 263).