The Shai-Gen are the most dangerous and difficult gang in the game. They should be tackled last, when your skills are very close to their peak. The Shai-Gen buildings are by far the toughest to break into and scale, with their lack of ledges and very few entrances. These entrances can very quickly turn into bottlenecks full of extremely well-armed Shai-Gen. So – as the disembodied voice tells you – speed and surprise should always figure heavily in your arsenal. Alongside a rocket launcher, of course.