This achievement isn't quit what it sounds like. It requires you to complete the game and find all of the collectibles, but it does not require you to make every single junction choice (i.e., you do not have to go replay each junction to unlock this and make a different choice).
In getting this achievement, you'll also unlock
The Media Baron achievement in Quantum Break worth 19 pointsFind all e-mails, presentations, TV shows, radios and posters.