600 is a Yahtzee-like dice game played with six regular dice. Players are trying to earn the highest score in 18 rounds in 4 categories: Numbers, Rungs, Clusters, and Patterns. On their turn, a player rolls all 6 dice up to 3 times and then enters the result in any free row. After 18 rounds have been played, the player with the most points wins. Included in Reiner Knizia's book Dice Games Properly Explained.