From GameBrew - a wiki dedicated to Video Game Homebrew.
Yam's DS (French) is an adaptation of the Yam's (or Yahtzee) dice game on DS. It is coded in Lua and requires Micro Lua DS to play.
The object of Yahtzee is to obtain the highest score from throwing 5 dice.
The classis Yahtzee consists of 13 rounds. In each round, you roll the dice and then score the roll in one of 13 categories. You must score once in each category. The score is determined by a different rule for each category. The game ends once all 13 categories have been scored.
See here for more information of the game rule and details of each categories.
Stylus - Pick categoies, Choose dice to keep, Reroll dice
A - Throw dice