Now you will have to locate three items around the map and shoot them with any weapon. Every time you shoot one Samantha will confirm this by saying something.
The locations of the items are:
A Teddy Bear holding a Bowie Knife: Above the M1A1 Carbine wallbuy on a window high up the building overlooking the Courtyard
A Monkey Bomb holding a Stielhandgranate and a Molotov Cocktail: In the open furnace in the Furnace Room, near the Thompson wallbuy
A Teddy Bear holding a Juggernog bottle and an upgraded M1911: In a cage in the Animal Labs, next to the M1897 Trench Gun wallbuy.
After shooting the final one, the Main Quest is done and Samantha will scream: "You win... GAME OVER!". In World at War, the player will be awarded with the trophy or achievement 'Elevate Your Senses'.