I am a big fan of the game Diablo. It has good gameplay, and an amazing story. The story is a great way to trigger the curiosity and excitement of the people, anticipating to play the game long before its release date.
A good story is a way to attract people in your vision and mission. Also, it is significantly easier for people to sell your cause if there is a good story behind your motivation.
This is what we can learn from the creators of successful games.