TriRock3,217,764 Locked 14 Nov 2014 02 Nov 2015
Just as in the international version, you don't actually have to play through the game on hard.
Start a game on 'Easy', and play until the final battle. Once you drain Atlas' Adam for the last time, hit 'start' before your needle hits it's target, and change dificuilty to 'hard', then hit 'start' again. Watch the ending and enjoy your achievement.