New super mario bros is one, I'd say.
No one expected it to be *small*, per say, but looking at those first weeks, it's definitely hard to imagine that it would end up selling 30 million.
In the US, in particular, it started off with 150k, and then went on to sell 10 million.
Bet with PeH:
I win if Arms sells over 700 000 units worldwide by the end of 2017.
Bet with WagnerPaiva:
I win if Emmanuel Macron wins the french presidential election May 7th 2017.