If you buy a physical copy, the version you buy is making the choice. If you buy the digital copy, you'll download the early part of the game (probably for free) until you have to make the choice, then you make the choice and buy that version of the game for $40. Either way, once you've bought a full copy, you can buy the other copy digitally for $20.
Then once the third part is ready, it will be available, likely for $20 as well, digitally only.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.