2/3 de la media es un juego multi-jugador donde cada jugador adivina un número entre 0 y 100, y trata de adivinar tan cerca como posible de dos tercios de la media de todas las conjeturas hechas.
2/3 the Average offers three different modes of play: Pass n Play, Multiplayer, and Single Player. In Pass n Play mode, the players take turns entering their guesses into the device. In Multiplayer mode, two or more devices connect wirelessly, and each player enters their guess into their own device. In Single Player mode, a player plays against any number of computer players.
The game can be customized by changing the upper and lower limits on the numbers that can be guessed, and also by changing the ratio (half the average, three-fourths the average, etc.)