I've just reached Montreal in Deus Ex: Human Revolution, and I have The Missing Link downloading in Steam right now. Does the DLC tie into the game, or do I need to launch it from outside Human Revolution?
In either case, do you recommend playing it during the campaign at some point or after I finish Human Revolution? If you suggest the former, what is a good (spoiler-free description of the) time to play it?
Best Answer
The Missing Link stands apart as an episode by itself, even though the timeline in which is happens is during the main story;
The Missing Link doesn't affect your main story progress, you can feel free to play around with any Praxis Points you come across and it won't affect any progress on any achievements you've been working on in the main Deus Ex story line as it isn't integrated into the main campaign.
Update (credit to Diziet): Certainly would recommend not playing 'The Missing Link' until the point in the game detailed in the spoiler.
In Deus Ex Human Revolution: Director's Cut, the Missing Link content is built into the main story and does directly effect your main story progress (including Foxiest of the Hounds and Pacifist).