Gameplay length will vary on gameplay style. There are no Quicktime events in this game and its up to the player to discover and unravel the story. Its pretty much an open world in the house, so explore where you can. Completionist can be in this game for many many hours, its hard to assign an amount of hours, but we have had people play anywhere from 5 to over 10 hours. Obviously the game will play much shorter if you knew exactly where every item was. So please don't share the location of items and ruin it for others. We will include some randomization of the items in the future to make it more difficult to share. Take your time, explore, watch your back and enjoy.