

Each wave lasts for approximately five minutes, depending on how many officers you kill. It is a hint of special units coming in, and when the assault will begin.

Throughout the game, occasionally your contact will say "An assault is coming in X seconds." Listen carefully to what he says. They should be taken hostage, as they sometimes count as civilians, and can easily be found. If you need to find a bank manager or someone who has important items, wait a few minutes, and the game will display that person in orange through walls.
