AngryLittleAlchemist on 03 October 2017
Assuming the original sold about 5.5 mil on all platforms, i'll say:
2.7 Mil on PS4 lifetime digital + physical(only because PS3 users are going to buy it on PS4), 600k on Xbox One, 700k on PC(this is actually the hardest one to guess ... it could also be 1 mil)