If you unlock the storage room, there is a radio on the barrel by the Teddy bear that has the voices from the Verrukt video. Go in the corner and use the grenades behind you and your flamethrower to kill. Turn left and to find a room and a wall in a protected corner. Go around the pillar over to where the steps are located.
Go around the steps and go back to the back of the room near the sandbags until you see a vanity or dresser object behind a pillar. When your upstairs, if you used the main steps on the front start area, turn around. Once you get 3,000 points, go upstairs in the zombie factory place.
