Pairs is a simple press-your-luck game. Players take turns taking cards, trying not to get a pair. If you get a pair, you score points (and points are bad). You can also choose to fold, instead of taking a card, and score the lowest card in play. Folding gets you some points, but catching a pair could get you even more.
Pairs doesn’t have a winner, just a loser. The first player to reach a target score loses, and the target score depends on the number of players. For example, with 4 players, the loser is the first player to 16 points.