The headline says it all. The Missing Link fills in the gap you probably didn't know existed in Deus Ex: Human Revolution's main storyline. A quiet sleep in a transport pod in the story turns out not to have been a quiet sleep at all, but a terrible nightmare in which Jensen loses his shirt aboard a stormy ship, and must get it back by any means necessary.
In seriousness, The Missing Link is surprisingly good. "It's rare for DLC to live up to a great game, rarer still for it to fix that game's biggest flaw," says Tom in our Missing Link review . You guessed it. They actually fixed the boss fights. It's almost as though everything turns out better when the core developers design every aspect of their game .