The game begins with Sam Fisher of Third Echelon, despite threats from their superiors. And during the investigation into the death of his daughter, Sarah Fisher (who died as a result of an accident caused by drunk driver during the Double agent), Sam learns that his daughter was not accidental and it now along with Victor Coste, former "fur" and long-time friend will keep hunting for Andrei Kobina, arms dealer, whose premise Sam, killed his daughter.

In this original project, we will talk about the grim institution Gotham City, a psychiatric clinic Arkham Asylum, in which at various times been visited by many enemies Batman'a, such as Two-Face and The Joker. It is the latter brings to life his evil plan, and the superhero in a black cloak again have to deal with problems. The developers call their game pretty bleak and frightening, drawing analogies with BioShock. The original story created by Paul Dini, who wrote and produced Batman: The Animated Series.

The Second World War, unfolding outside the hospital, does not abate and in the brain Violetta Summer. Being in a coma, Violetta, an agent of British intelligence, is once again facing the horrors that she had to endure in the fight against the Nazi regime. The game Velvet Assassin you open the truth of the war, which has never spoken aloud.