I just made this up, so it's probably a lousy game. But here goes.
You find a Wikipedia entry that contains content of questionable accuracy or sanity. Then you add your own sentence to it. Then everyone has to guess which sentence is the fake. Here's a sample.
Medina is known for its Root candle Company. A. I. Root in the late 1800's built the factory and used the honey of many bees to create the infamous candles. Because of the honey candle business, tourists can find many bees throughout the city. Each 10 bees collected makes a new item available at your Medina safehouse.
Click here for the answer: http://en.wikipedia.org/wiki/Medina%2C_Ohio