http://www.youtube.com/watch?v=o_GWeu4lU2M
Read the top comment.
[spoiler]So Walker actually never went home. He either killed all those soldiers, died trying, or shot himself when he finally found out the truth. A pretty depressing ending to an already depressing game. And I thought that he actually had a chance of redemption.[/spoiler]
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Walker just went insane in my game. Or was I who did. I just ended up shooting Konrad, and all the soldiers. I don't think I could ever except the blame for what I did.