If you wish to hide your recently played games along with game hours you can easily do it with few basic settings. Open Steam dashboard and click on your name arrow down at the right-hand top and choose View Profile. From your profile click on Edit Profile at the right hand side. Now from the left-hand menu click on “Privacy Settings” and come to the Game details section. Here you can either make it for friends only or Private and then check the box of Always keep my total playtime private even if users can see my game details.