No, you can start TF2, leave it open all week and get 168hrs play time. I'm not 100% sure, but you can try it as an experiement and report back :P.
No, you can start TF2, leave it open all week and get 168hrs play time. I'm not 100% sure, but you can try it as an experiement and report back :P.
You'll also notice that Steam will report a friend/other user as "In-game" while they have TF2 open whether they're connected to a server or not.