Family Game Night
91 Achievements
1,850
Xbox 360
Dice Time
Clocked up over an Hour of playtime in Yahtzee
20
How to unlock the Dice Time achievement in Family Game Night - Definitive Guide
Self-explanatory, just play the game a lot and this will come. Alternatively, you can start a game and leave it running to increase your time while you're not playing. You can check your time in the "stats" section when you view your trophies. All game modes contribute to this.
NOTE: This may not unlock straight away. Try playing a different Hasbro game for it to unlock.
This can be done in any game mode.