An expansion pack, expansion set, or supplement is an addition to an existing Board or Card game. These add-ons usually add new game areas, weapons, objects, and/or an extended storyline to a complete and already released game.

As expansion packs consist solely of additional content, most expansion packs require the original game in order to play. Although another expansion packs, called stand-alone expansion packs, do not require the original game in order to use the new content.


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