Terrorists must assassinate the VIP or just engage the VIP from reaching the extraction zone in order to win the round while the counter-terrorists must protect and escort the VIP to the extraction zone to win the round.
There are some weapons that cannot be purchased in this mode.
One of the Counter-Terrorists will become the VIP and must reach the extraction point. He only can use the USP with two spare magazines. The VIP also has 200 kevlar points instead of 100.