IBM have a cool app called CityOne.
It is a SIM game where you are a city CEO and have to make decisions on how best to run the city.
However it has a humungous registration wall in front of it. I added the red circle to highlight all the mandatory fields in the form.
Gotta wonder if anyone makes it over the wall and in to play the game.
What is their bounce rate? Gotta suspect it is going to be high.