It consists of a special deck equivalent to two regular decks of cards, and can be played by two to six people. Phase 10 is based on a variant of rummy known as contract rummy. Phase 10 is a card game created in 1982 by Kenneth Johnson and sold by Mattel, which purchased the rights from Fundex Games in 2010. Saving important cards knowing when to put down those cards matching, ordering Cards used in Phase 10 (original version with colored Wild and Skip cards)