Counting to 20 is a popular game played between two people. The goal of the game is to be the first one to say "20". Each player can say one, two, or three numbers in the counting order per turn. Each player must start with the number after the last one that the other player said. For example, the first person can say "1", or "1, 2", or "1, 2, 3." If the first person says "1, 2", then the second person could say "3" or "3, 4", or "3, 4, 5". Whoever says "20" is the winner.