I meant how do you configure your mods/mod manager so steam still monitors play time and achivements. Because whenever I launch fallout 3 through steam it doesn't monitor play time.  Oh, sorry - my bad in not understanding your post.  Personally - I do not want Steam or anyone else to know my game play time and such. It is really none of their business, to be honest.  CASE IN POINT: Back in 2012, I had this guy on Steam that was literally watching my Skyrim Play Time .... and posted to me as much.  For which I told him, " Do you realize how creepy this is? You are watching other player's game play time. You need a life. But you do not understand that I have 2 computers. My work computer and my game computer. Skyrim is loaded, but is seldom played ... because of work. But it's loaded, so IF / WHEN I have a few minutes here and there, I can continue the game. So ya, so much for you Policing my game play time. Get a life! " Ok, thanks for trying to help!