Most of the opening level plays like hide and seek, or tag with bullets, working you through suit functions and showing you how enemies work in teams, radioing after each other, Metal Gear-style. The enemies I'm fighting--they looks like SWAT teams, but I'm still not sure--scan all angles constantly and spot me unless I'm truly hidden. And they move. Most don't wake up then go back to sleep, or follow patrols loops. They stick their noses into everything, and if you rile them up, they come after you, probing and perusing, wending their way between tents, fences, sandbags, sandbag walls, fountains, and the odd New York City tree.