Playing hours

Games should have two features in respect of playing hours: an advisory on the likely playing hours before play is started (perhaps expressed as a range); and recording of how many hours a play has spent playing the game. The latter would record the time whilst the game is running where there is mouse/keyboard activity, and separately record the length of the AI turn phase. For random games, the advisory on likely playing hours could be modified from actual play length data from previous random games.