I did this on my second playthrough of the game. start a new game and select the following options when the choices are offered.
Choice 1- Choice 2- Choice 2- Choice 2- Choice 2- Choice 2- Cut scene- Choice 2- Choice 1- Choice 2- Choice 2- Choice 1
Achievement will unlock when you save the game. its the first choice after the credits roll. This can be skipped by pressing b.
Another side note make sure you set the fast forward button on the RB button. will save loads of time.
I can guide you thru with any of it if need be, just contact me