Agatheron's Points of Light
“Metagame” is simply a term for conversation about the rules outside of roleplaying. This can be both good and bad. A good definition is this “the use of out-of-game information or resources to affect one’s in-game decisions.”
“In role-playing games, a player is metagaming when they use knowledge that is not available to their character in order to change the way they play their character (usually to give them an advantage within the game), such as knowledge of the mathematical nature of character statistics, or the statistics of a creature that the player is familiar with but the character has never encountered. In general, it refers to any gaps between player knowledge and character knowledge which the player acts upon.”
When we played 25 years ago, we used to memorize the original Monster Manual. As such nobody would be surprised by the shambling mound, rather than it being this terrifying creature where the earth and plants suddenly spring to life. Our own example of metagaming.
In this wiki, metagame information is more of a section dealing with anything outside the roleplaying environment. Included in this will be house rules, but also a place where we can look at character roles and how it fits into the game.