At the mission selection screen, hold LB + RB and quickly press Left(2), Right(2), Y(2).
Head shots are instant kills. Body shots require two or more shots for a kill.
Xbox Live gamer points
Accomplish the following tasks to unlock the indicated number of Xbox Live gamer points (1,000 total possible points):
Complete training mode: 50 points
Veteran Of Crossing the Rhine: 60 points
Veteran Of D-Day: 60 points
Veteran Of El Alamein: 60 points
Veteran Of Fortress Stalingrad: 60 points
Veteran Of Hill 400: 60 points
Veteran Of Rommel's Last Stand: 60 points
Veteran Of Stalingrad 42: 60 points
Veteran Of the Battle for Caen: 60 points
Veteran Of the Tank Squadrons: 60 points
Veteran Of the Winter War: 60 points
Won The War: 150 points; game completed
War Hardened: 200 points; game completed on Hard or Veteran
Completing Veteran mode:
In Veteran mode, your life expectancy is cut to three or four shots until you die. However, Veteran mode does not improve the enemy's aim or strategy. Use small blocks or small bulges of hills as cover and crawl, because you do not get points for kills, so do not take the Nazis head on. Let your allies lay some fire, if there are any. If not, throw a smoke grenade and shift between crouch and crawl positions, laying cover fire and stall some time for the smoke grenade to spread before the Nazis rush in. Use this smoke cover to fall back to the nearest safe position where you can regroup or hide and pick the Nazis off from afar.
Determining grenade danger:
The grenade indicator is useful, however, you do not have to run away from it every time. If the indicator points that a grenade has landed near you, but you are taking cover behind a wall, you do not need to run away. Instead, the grenade will explode and not damage you at all.
Determining if enemies are still alive:
Even after you shoot the enemy, he may still be alive. Make sure to aim your crosshairs at him and see if it turns red. If it does, it indicates that the enemy is still alive, and you must shoot him again. Do not give the enemy the chance to shoot you from behind while he regains consciousness.
You will first need to find the gun for which you would like unlimited ammunition. This trick will only work for one type of gun. After you have chosen a gun, find the exact gun on an ally or enemy, then kill him. After he is dead, his gun will appear on the ground. When walking over the gun it will say you have received that weapon's ammunition. If you have full ammunition, waste a few shots then pick up another of that same gun. However, this time the gun will stay on the ground. You can keep walking over the same gun on the ground repeatedly for more ammunition each time.
Head shots are instant kills. Body shots require two or more shots for a kill.
When you find a Kak 98, pick it up. It is one of the most powerful guns in the game. There is a scoped-Kak 98 in the last level (Dragon's Teeth) in the second bunker in the building.
Burgundy, France: Sniping location
Go where the turret is in the building that is not blown up. Climb on the ledge of the turret. Look to the right and hug the wall tightly while moving forward. Once you go a very short distance onto the invisible ledge next to the shutter, run and jump onto the roof ledge in front of you. Look to the right and jump through the shutters. You will be in a room where you can see out from, but other people cannot see you. Note: You must climb on the window ledge a certain distance to shoot out and throw grenades.
Kalach, Russia: Leave level boundary
This trick requires a partner. Create an online team deathmatch game and set friendly fire on reflected damage. Start the game and have both players go into the room all the way in the southwest corner. There should be a furnace and some boxes in the corner. Have one player jump on the very top of the boxes. The other player should stand in the same room but not close to the other person. Have the player standing on the boxes throw a grenade at the other person and try to jump at the same time the grenade goes off. That player should try to jump on to the thin piece off wood above the window to their right. If successful, then jump from the window to the wooden planks on the roof. Next, carefully walk over the planks and around the edges until you get about directly above where you started. Then, jump to the outside of the level. This may require several attempts.
Matmata, Tunisia: Sniping location
There is a dome with a ladder next to it. Climb up to get onto the ledge. This trick requires two players and you must be able to talk to each other. Have a player climb on the ladder as far up as they can without taking their gun out and walking off. Then, have the other player climb up the ladder. As the player climbing up the ladder hits the person at the top, have both players press Left Analog-stick Up and look at the dome with the other Analog-stick. You should keep going up until you fall onto the roof part or inside the dome. Note: To go up high enough to get inside the dome, this action needs to be timed perfectly. It is very difficult and time consuming if not done properly Once in the dome, you cannot be shot unless you step outside. You can shoot out and grenades cannot hit you.
Moscow, Russia: Get under the map
Two players are required for this trick. In online mode, go to the back of the map past the blown up building near the middle. There is a raised platform against the wall. There is a ladder on the side of here. It is easy to find as it is the only place in the map with a ladder. Get two people to get to this ladder. Have one person go up the ladder as far as possible without drawing his weapon and look straight up to the sky. Then, have the other person walk up the ladder below them, looking up. Say "go" or something else as soon as they hit the person above and keep going. As soon as the player on top hears this, he should go at the same time. This normally requires a few attempts. If done correctly, you will continue going past the ladder, into the sky. This depends on how well and accurately you do it. As soon as the sky turns completely white (because you should be looking up), move to the right until you fall. If done correctly, you will land on the roof of the building. Once here, you can jump onto the adjacent roof to the north, over the small wall. Once on this roof, continue going down the roof slowly. Once you get to the edge you should be able to see some boxes below, like the little alcoves above the platform with the ladder. Aim for one of these and you should land in it. Once done, jump into the boxes on the other side one down each time. Do this to gradually make your way down. Once you get to the floor, look to the east. You can clearly see a big "rip" in the map. Go straight down here and out the back of the map. Make sure you do not go out of the shadowed area or you will "fall off" the map and have to start again. When you have gotten out here, make sure you do not try and get into the map until you have followed this part: move south, without going past the shadowed area and without going near the buildings. When you get to the corner where the buildings stop, turn west. Keep going west until you get to a turn in between some buildings. It is easy to see as there are lots of windows visible, and there is a gateway in the corner which should be to your north. Go down here then go straight through the doorway. Once you have made it through, you can go absolutely anywhere under the map. You can shoot people and can throw grenades at them. They cannot see or shoot you. As long as you do not go out of the shadowed area and do not waste ammunition, you can continue to play down there.
St. Mere Eglise, France: Go through window
In the cemetery there is a hut. In the hut are some boxes. Jump on the low box next to the window, then jump towards the window facing the wall. As you are about to hit the window, crouch and you can go out the window. You can shoot from that side of the hut. There is also a tractor there. You can jump up the front of the tractor then jump on to the roof of the hut. This is a very good sniping location, but you can be shot if spotted.
You will first need to find the gun for which you would like unlimited ammunition. This trick works for only one type of gun. After you have chosen a gun, find the exact gun on an ally or enemy, then kill him. After he is dead, his gun will appear on the ground. When walking over the gun it will say you have received that weapon's ammunition. If you have full ammunition, waste a few shots then pick up another of that same gun. However, this time the gun will stay on the ground. You can keep walking over the same gun on the ground repeatedly for more ammunition each time.
Mission select screen reset:
Use the following steps if you went through the game then returned to do your Veteran achievements and the game reset your mission select screen. Enable the "Level select" code and choose the missions that you have not done yet for the veteran achievements. You will not be penalized for using the code. However, you must re-complete the missions you already have the achievements for to get the "War Hardened" achievement.
Multi-player mode host:
This trick requires two players in multi-player mode. Have player one go to system link and create a game on Call Of Duty 2. Choose a level and set the times (30, 45, or 60 minutes) and other parameters. Remain at the screen and do not start the game. Have player two start a different game, such as Perfect Dark Zero or an arcade game (so you do not have to change discs). Then, have player two invite player one to his game. Have player one accepts the invite, but when prompted to log out select "No". You should now be the host of the game and it will be set to the way you want it.
Multi-player sniper rifle reload:
When everyone has a sniper rifle, use that same gun. When you are killed, view the replay of your death. When they shoot, directly after that, respawn. Your player should now be reloading.
Negative number of grenades:
When playing online, have one grenade. Hold it in your hand and release it. When you release it, hold Down and it should say that you have 0 grenades remaining. Now every time you want to throw a grenade, press Throw. When you throw, press Down and your grenade count should be a negative number.