Trekort, Tre-Kort or, in Swedish, also Trikort, is an old card game of Danish origin for four or five players that was usually played for money. It was also known in Sweden, where it developed into the variant of Knack. The name Trekort is also loosely used to describe related three-card games such as Swedish Köpknack. The name means "three cards" and may therefore be related to German Dreiblatt.