The achievements are unrealistic. I've been trying to get the "get 6 Zilch free games in a row". Even if I reload the game if I get a Zilch so it doesn't get counted, I still only have 3 zilch free games in a row. Just because an event is statistically possible doesn't mean it is realistically possible, i.e. all the molecules of a gas moving to one corner of a box or having a million monkeys try to type out shakespear.