Screen Tearing

[Eros]

I have a very weird problem with this game. I have played through the game with NO problem whatsoever until I almost finished the game. One day I turn the game on and I am getting very annoying screen tears and I don't understand what happened to make my game behave in this way. When I turn Vsync, it helps but it is just not the same as before. I was getting NO screen tearing at all WITHOUT Vsync turned on and now no matter what I do now I get screen tearing. I tried re-install, verify game cache still to no avail. Any help would be appreciated

Thank you