Each player’s score is equal to the lowest value of several categories. Whoever has the highest lowest value is the winner.
Tigris & Euphrates is an early example of this mechanism. Players are collecting four different color cubes - red, green, blue, and yellow - and their score is the color that they have the least of. A player with 12 red, 10 green, 6 blue, and 2 yellow has a final score of 2. This forces players to not be too specialized in which cubes they collect.
Highest-Lowest Scoring is a special case of Set Collection, where only complete sets are counted.