You need 10 Challenges completed to get the Achievement and this will be probably your last in the Game for the full completion.
In my Video i will show you a easy way to get it incl. all other Achievements in the game without playing it most Time just by simulate it.
After you have a few levels to select check the Compensation on the Level and see if there is as a Challenge active if not press start and reset Character and try again also mix between different Characters.
if you see a Challenge complete the level to get 1 more. Its random everytime if there is a Challenge on the Level or not but your Chance is higher if you have more Levels to choose.
Achievement will pop after you start the next Mission.