How to turn on two player setting in Fruit Ninja

I think there was a similar question to this lately, but I can't find it currently.

Anyway, the way the game works, it only increments the achievement counter forward. However, the developers didn't consider this when implementing the achievements, as the counter is only checked once -- people who bought the game before the achievements were implemented are in a similar boat, unable to trigger any of the totals they have long since passed.

Unless the developers patch in a fix, there's no way to achieve it with your current game file.

You can get this achievement by going into Classic mode, slicing one fruit, and then restarting. Do this 3 times in a row, and after the third restart, you should get the achievement.

I found this information here, but I did try it out and confirmed it on the iPhone version.