Just like an errata, an addendum to a game is made or at least validated by its designer or publisher, and is considered to be part of its official rules. It is also sometimes distributed along with the game, as a sheet insterted in the box or the rulebook. The new edition of a game will normally include all addenda to the previous editions.
Clarifications and FAQs differ from an addendum in the sense that they usually further explain some existing rules, whereas an addendum typically modifies existing rules or adds new rules and options.
What can you add to a game’s rules? Well, new scenarios, new characters, solo or team rules or other variants.
Errata can be seen a specific form of addenda, which contain corrections to rule errors discovered in the published rulebook. Addenda are rather meant to cover game play situations not provided for by the published rules, or offer new material.
The term addendum is sometimes used colloquially as a synonym of extension, companion or spin-off game, or to designate any additional content pertaining to a game, or a volume in a game series. For example: “Race for the Galaxy, and its acclaimed addendum, Roll for the Galaxy”.
References and Further Browsing
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