In this game you make a wish and the next poster will grant it. But, there is a negative string attached. So, be careful what you wish for.
Example:
Person 1: I wish I had a dog.
person 2: Granted, but it eats your favorite stuffed animal.
I wish I had a car.
Person 3: Granted, but it doesn't run.
I wish I had a new tv.
Person 4: Granted, but it only displays in black and white.
I wish I had a new house.
Okay, I'll start.
I wish I had a billion dollars.