Not to shady for a bit of DLC that should fill in a missing three day gap from the Deus Ex: Human Revolution’s main storyline. The Eidos Montreal team has confirmed via their Tumblr blog saying:
“The Missing Link is approximately five hours long, but as always that varies depending on your playstyle and completionist urges”
In “Missing Link” we find Adam who has been tortured by Belltower agents and had his augmentations disabled, he must rely solely on his basic capabilities to escape from a freighter, destined for an unknown location. While fighting for his survival on the ship, he uncovers another layer to the conspiracy that he never would have suspected. As Adam, gamers will befriend new, mysterious allies and fight ruthless enemies to discover what was happening in the shadows during the events.
The Missing Link will be made available in October on PC, PS3, Xbox 360, Steam, and OnLive.