Well, on my first play through, I blame Walker for the troubles, so I made him shot himself in his day dreams. Unfortunately, that killed him in real life. I thought shooting himself made Walker finally blame himself for the sins he committed. I mean, Konrad said that Walker can blame him for all the troubles, but I thought it will lead the soldier to a bad ending. I guess I was wrong.
So, I got the second ending by making Walker shoot Konrad, and it's a bittersweet ending. After the credits, there is a secret ending which determines the fate of Walker again. I choose the Surrender ending, and Walker was spirited away by his rescuers. Unfortunately, that "good" ending is a bad ending since Walker is mentally scarred forever. I never choose other secret endings, because Walker has been through a lot of firefights, so letting him die again isn't right.
I used the WP and killed all the civilians accidently and I didn't think I had a choice at the time so I killed the soldier who killed the thief's family. I guess it's a game that you need to play through twice.
So emotionally breaking, mind bending, and moral questioning of a game. This wallpaper captures Walker's image perfectly as he tries to lie to himself that it's all Konrad's fault, meanwhile Adams is planning revenge on the refugees for… well, I'm not going to spoil it. Perfect wallpaper, thanks for the upload.