The counting game is a cooperative game usually played with a large number of participants-- possibly as few as three or as many as twenty, but working best with about ten.

As a group, the players must count from 1 to 20, subject to certain rules. (The specific number of 20 is somewhat arbitrary and can be changed.) The rules are:

• When two players say the a number at the same time, or any player counts out of order, counting starts over at "1". It's difficult to tell whether or not two players said a given number at precisely the same time, but if two players say the same number, one rule or the other was violated and counting must again start over.

• Each participant must contribute at least one number; none may be silent through the whole game.

• Participants usually lie on their back or sit in a dark room, so that body signals cannot be used.

• No player may say two numbers in a row. (That is, a person saying "6" cannot say "7".)

• "A-B cycles" are also not allowed. While it's generally permissible that player A could say "6", then B, "7", and A, "8", for this pattern to continue would be not.

• Similarly, recognizable (players counting in order, counterclockwise, or clockwise) patterns are discouraged. (This component of the success condition is not well-defined, but since this game is normally not played in a formal setting, that usually does not matter.)

This game, especially with large groups, is quite difficult. If a rhythm develops, two players will be likely to say a number at the same time.

Impatience is also an obstacle for players in this game. Strategically speaking, it is most beneficial for players to delay, and have longer intervals between numbers, as this reduces the likelihood of collision. However, players become nervous during delays, and often elect to "take charge" of the situation by saying the next number.