Ok hi all this is my 1st guide on this site so if the guide is not to your liking please let me know many thanks.
Before going for this achievement I would complete most of the game if not over half, as you will need bits that unlock.
Ok on with the guide, so all you got to do is collect 8 moustaches around the game and pop goes the achievement. It also unlocks the secret moustache world.
1st location on the map pause the game and select the (options) and then (about) it will take you to the credits, near the top on the right hand side you will see and man on a ledge under that you will see a moustache. Once you see it press Y for Xbox 1, triangle for ps4. This will start to unlock the moustache collectibles, when you see the moustaches in this guide remember to press Y or triangle to collect them.
2nd start any level in the (hall of diamonds) once you have unlocked it and fail it, once you fail a moustache will appear in the top left corner of the retry screen.
3rd go back to the pause menu and another moustache will appear in the top left corner.
4th in the pause menu select the (options) again where another moustache will appear in the bottom left corner.
5th on the map screen you will get a trophie cup which you will get before (the hall of diamonds) go on there and in the top left corner their will be yet another moustache.
6th in the top left of the map you will get a (boom box) go on there and in the bottom right corner their will be another moustache.
7th ok next on the map screen again you will unlock a (statistics box) go on there and you will see another moustache above the word statistics.
8th ok the last moustache will be on yet another unlocked box on the map called (the one rock challenge) go on there and in the top left corner you will see another moustache.
after collecting the last moustache the achievement will and should pop, and on the map screen you will see the secret moustache level in the bottom left corner as your 1st level.
Well I hope you all found this guide helpful, please like and share if you did, once again many thanks.