1 Freeware available for Nacht und Nebel Free Full Game, see below
Stalin's Red Army is taking control over Berlin and turned eastern Germany into a vast field of ruins. Damien, a spy, has been captured by the enemy and transfered into a bunker, buried deep below Berlin. He wakes up into a dirty rotten operating room with its door open. Hoping, he decides to make his way through the barely lit corridors of the Bunker.
But before to be able to see daylight again, he will have no other choice to learn some of the Nazis' darkest secrets and fight the abominations lurking in the shadows of the Bunker's cramped corridors...