For this, I thought the fact that going back in time and having him actually be the one that started the plague, even though he was trying to stop it, was the unforeseen consequence.Am I wrong on that?
Edit: After thinking about it for a moment, I am guessing that you stopped reading at "**END**" and "After the credits roll". If that is true, that is entirely my fault and I've fixed that. But directly after that, the "consequence for his actions" is conveyed, which is also the (hopefully) nifty twist in the story.
Uh... no offense, but that part after END was the part I thought sounded awful. The rest is interesting, but I would be really irritated if I played a game which is ostensibly about using time travel to fix a tragedy (a theme I really like) but it turned out that I hadn't fixed anything at all and all my effort was either wasted or misguided.