The Metro

Click the answering machine to get the first message, then open the package outside the door.

Follow the steps down to the first floor and get into the car to begin.

Use free aim (a targeting system that allows you to look around freely) to look around, then lock onto the enemy at the door.

Rush in and finish him off with the Space Bar grab when the door opening knocks him out.

Continue north and lock onto the guy taking a piss.

Throw the bat at him the moment the door opens, as the door won't reach him. Finish him off to clear the first floor.

PUZZLE PIECE: The "U" Puzzle Piece is located at the south end of a hallway west of the entrance.

On the second floor, wait for the patrol to enter the south-east corner of his patrol area and then take out the sentry.

Once the first sentry is dead, kill the second sentry with a shot from behind.

Pick up his knife and lock onto the next patrol in the south hall.

Stay out of view of the doorway, follow his patrol, run out, aim through the doorway, and throw the knife to kill him.

Pick up an object and lock on to the sentry to the east, who is looking right at your entry point.

Hit him just as you enter the hallway to knock him out, then kill him.

Pick up a knife and throw it at one of the final guys in the north-west.

Pick up the other knife and throw it at the other. Kill the remaining guy and take his briefcase.

Return to the first floor; the doors will be shut. You can't pick up weapons while holding the briefcase, so lure the patrols near you one at a time and knock them out.

Kill them off to unlock the doors and return to the car.

Follow the alley in the next area and drop off the briefcase.

Rush in and kill the wild bum that appears.

Get to the car to end the chapter.