Penumbra: Overture Mac Demo for Mac

From Frictional Games:

Like all good nightmares, Philip's begins with something all too real - his mother's death. The days following the funeral are characterized by nothing, save for an incessant feeling of abandonment. Until, that is, he receives a letter from a dead man. Philip's father left before he was born, taking his reasons with him. Now, here he is, opening up the door from beyond the grave. That door leads to more questions, and those questions lead to Greenland. Philip follows the clues - they're all he has left. On leaving the final signs of human civilization behind him, in search of the location mentioned in his father's ambiguous notes, Philip wonders if he's left some part of his humanity behind as well.

Soon, that will be the least of his fears. Now, Philip needs your help. He's found an inexplicable metal hatch, in the middle of a frozen wasteland. Inside, is something yet more unfathomable. Step into the unknown. A demo of the first few levels of the full game. Version 1.0.3 includes unspecified updates.

View larger image