Color Gin (1969)

Color Gin was published in A Gamut of Games. It is a game derived from Gin Rummy, but you must score points separately for all four suits. So effectively you are playing four games at the same time.

You score points in the same way as Gin Rummy, but the following condition prevents you from scoring in a suit:
An unmatched card
A sequence stop
Missing suit in a three of a kind.

You can only go if you can score in at least one game, and as any player scores 100 points total in a suit, that suit stops counting points, so you must pay attention have points only in suits that are now worthless.