|“||In the days leading up to the events of The Bureau: XCOM Declassified, Agent Nico DaSilva volunteers for a series of dangerous secret experiments to identify and treat a terrifying new pathogen. Maximize your combat skills and push your team to its limits to protect a friend from his own hallucinated terrors.||”|
–Steam Store description.
Hangar 6: R&D is a DLC campaign available for The Bureau: XCOM Declassified.
It was orginally released on November 8th 2013 as an exclusive XBOX 360 piece of content but has since been made available for purchase and download on PC platforms. The DLC offers an eight mission mini-campaign that serves as the prequel to XCOM Declassified's storyline.
The DLC introduced several new weapons not found in the main campaign.