Penumbra is a horror adventure game featuring state of the art graphics and makes heavy use of physics. Penumbra was created as a technology development project, with the aim to explore new uses of physics in games. The penumbra game is the final product of this technology experiment.

Just when your mother has died, you receive a card from your father, who you had believed was dead from before you were born. In it he asks for forgiveness and he leaves you a present: a key to a locker in the train station. One opening the locker, you quickly realize that there is a whole lot more about your father that you never knew about. All may be revealed in a far away place, an mysterious bunker.