Special Forces have located and neutralised a known terrorist who has been hiding out in a deprived area of the city for the last ten years.
That's the good news...
Up on the roof of his abandoned high-rise, the maniac has left a huge bioweapon, with a timer on it.
You have been 'volunteered' to lead a team to neutralise the warhead, and Special Forces have helped you infiltrate the courtyard, but they won't go near the weapon. That's all down to you...