Family Game Night

Win 50 games of Yahtzee. Your stats are found in the trophy section. All game types contribute to this.
This can be done in any game mode.

Weffalump has found a quick way to achieve this in less than 30 minutes:

1. Start a single player custom game with game mode set to "Half-Card"
2. Roll the dice once then select all five dice so they are put into the slots at the back.
3. Repeat step 2 until you "Bust" and are pronounced the winner. Usually only takes 1 or 2 rolls.
4. Select play again and repeat until achievement unlocks. Each win takes about 30 seconds.