The HD-effect seems to hit this game as well as it's only ~10 hours long.
The single player campaign takes about 15 hours, it can be done quicker like any speedrun, for example the hihgly aclaimed Half-Life 2 can be completed in well less than 2 hours (including the non-skippable cutscenes). Of course, there are a lot of hidden extras in this game which can keep you busy for much longer and of course there are many multi-player options in this game as well, which can keep you busy for as long as you want.