This is a competitive game for two or more players, based on Set Solitaire.
(Don't you just love oxymoronic names?)
One deck of SET® cards per player, and enough room for each to play Set Solitaire.
Everyone plays Set Solitaire at once. As soon as any one player finishes, all players must stop. Whoever has collected the most Sets wins.
Try it with either of the variations mentioned in the Set Solitaire rules.