Left 4 Dead/The Crane

You're in the employee room of a hotel, and are leaving by the back exit.

Route

 * Exit hotel, turn left.
 * Climb the fence by the overfilled garbage container.
 * Climb the back of the truck and the fire escape above, entering the first available window set.
 * Go up the stairs in the back of the building.
 * Exit the building and head to the crane.
 * Pull the lever to lower the crane - this alerts the horde since the crane's is squeaking.
 * Walk across the roofs - turn right, right, and left.
 * Straight into Merril Law Office, and exit the window to the next building.
 * Turn left, go to the exit down the stairwell, and cross the cubicle to the exit sign - follow the exits until you reach ground floor.
 * Take the exit to the main street.
 * Watch the car alarm - one armed car is to the left of the main entrance.
 * Once outside, enter the storage shop to the left, and beeline to the saferoom.