Gnav is a traditional Danish and Norwegian social game that has been played with either special cards or wooden pieces with similar motifs. Gnav packs appeared after 1820 and the game was popular until c. 1920. The game can be played by 20 or more players, and a minimum of two. Today, only the playing card version is available in Norway.

A card game is any game that uses playing cards as the primary device with which the game is played, whether the cards are of a traditional design or specifically created for the game (proprietary). Countless card games exist, including families of related games. A small number of card games played with traditional decks have formally standardized rules with international tournaments being held, but most are folk games whose rules may vary by region, culture, location or from circle to circle.