The campaign game sees you lead your four man team through a series of sixteen missions, varying from cramped little houses to the top floors of City Hall, taking in a bank, a construction site, the sewers under UCLA, the control tower at LAX airport, and a Russian Orthodox church along the way.
Level design is generally excellent, and all of the locations look and feel like the real world.
And to make things more interesting, every time you start a mission the positions of the hostages and terrorists are randomly shuffled around, making it impossible to just memorize where they all are. It all adds up to a coherent and believable world, which helps suck you in. And although the game is set five years in the future, the politics, weaponry and storyline are all firmly rooted in the here and now. The 3D graphics engine that powers the game is hardly state of the art, but it's on a par with, say, Half-Life, and certainly more than a match for any other tactical combat game I've seen. Unfortunately that graphic detail comes at a cost though.