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- "Endgame": Nazi trucks
Select Campaign mode and play "Endgame" in Act 3. After exiting the caves during the speedboat chase, notice the village on the hills to the left coast. You can find a Nazi truck from Call Of Duty 2 behind a low wall near a pontoon and another one farther down at a jetty. Note: You will lose Shepherd by stopping to find the trucks.
- "Estate": Infinity Ward Gamestation
Select Multi-player mode and the "Estate" map. Search the home theater to find an Infinity Ward Gamestation 5 game console.
- "Evasion" Spec. Ops mission: "3 Star" rank
At the very start of the mission, run forward until you see the crosses or about four or five seconds in. Go to the right side against the fence and get prone. You must do this fast so the guards do not see that you are advancing toward your beginning position. Remain prone until four guards pass by. You can crawl to a better position to view the advancing guards if desired. You can get up and continue to the right after the fourth guard passes, but stay along the fence. Then, run and go under a pipeline. If you stop and look to the left where the pipeline goes, you will see a few guards; just ignore them. Move slowly and continue to the right. You will soon encounter a guard and a dog that will come up the path to the left. If you run, then you will not see the guard. There will be another path to the left with two guards on the far side of it. Ignore this path and continue a few more steps to get beside a tree in the middle of your current path. From this tree position, you will be able to snipe those two guards. Before rushing onward, make sure to take out the guard and his dog in a small clearing to the left. You must advance slightly along the fence for a clear shot. Once that is taken care of, you can now continue past the two guards you just sniped. Get prone a few steps ahead of them. There will be a small clearing. A patrol consisting of three guards and two dogs will pass by. Slowly follow after the last guard, but make sure you keep your distance or risk them seeing you. After a short distance down the path, there will be one guard and a dog stopped just past the pipeline, but on the path. Wait for them to leave before moving ahead. After a few more steps, get prone and wait for another guard and his dog to leave as well, but stay close to the pipeline. There will be a guard walking to your left as well going toward where you came from. Once those guards leave the area, crouch down and sneak up the bank of snow and go underneath the large pipeline. Once you move ahead enough following the pipeline, you should see two guards at the top of the hill in front of you, just after the pipeline turns to your right. Quickly snipe them and move up the hill to their position. Once on top of this hill you will see your green smoke and can quickly slide down the other side to complete the mission.
- "High Rise": Sniper position
Look from the center of the map at the cranes, then to the left side of the map. Go that side's back left corner. You will see broken scaffolding. Sprint from before the ledge and jump to the left outside yellow railing. Note: The railing is vertical. This is a hidden ladder. Climb up this railing/ladder to the top of the scaffolding. Walk to the right of the scaffolding along the ledge of the building. You will eventually reach another scaffolding. Climb onto this scaffolding. Walk to the top. Look towards the building and climb onto the higher ledge. Follow that ledge going left. Keep going forward and you will reach the roof. This is a great sniper position. You may want to bring a Tactical Insertion because other players may discover you on your way to the top, or while you are up there, and lob grenades.
- "Loose Ends": Blow-up doll
Start the mission and continue all the way until you get to the first building. Once clearing the entire first floor of enemies, make your way upstairs to breach the doors. Breach all doors on that level until you get to the last door to breach on that floor. Once you squad has announced all clear, make your way into the bathroom, which should be to the right of the room as soon as you breach it. Look into the bathtub and you can see a blow-up doll with colorful stars on its chest and a circular mouth.
- "O Cristo Redentor" Spec Ops mission: Easy completion
Follow this pattern to easily complete the "O Cristo Redentor" Special Ops mission under the Hardened or Veteran difficulty setting. For every ten defeated militia, two dogs will attack you. Typically one will appear from the high ground behind the fence, and another from the west. For every ten defeated men, run to the white truck near your starting point. Jumping on top of this truck will trigger the dogs to freeze wherever they stand. Lure them by standing on the ground. When you hear their barking get near, leap onto the truck when they are in the vicinity. Now that they are frozen, you can pick them off wherever they stand.
- "The Hornet's Nest": Infinity Ward teddy bear
Select Campaign mode and play "The Hornet's Nest" in Act 2. Go to the market and look for a soccer ball on a table to the left. Walk a short distance ahead to find a television set. Break its screen to find an Infinity Ward teddy bear inside.
- Camos
Complete the Ghillie in the Mist challenge to unlock different camos (ghillie suits) for use with your sniper classes:
Artic camo - Get 50 one-shot kills with sniper rifles
Urban camo - Get 100 one-shot kills with sniper rifles
Desert camo - Get 200 one-shot kills with sniper rifles