Successfully complete the game under the easy difficulty setting to unlock the "Big Head", "Ricochet", "Head Shot", and "Ricochet All" cheat options. The remaining cheat options can be unlocked by completing the game under the other difficulty settings.
Open All Cheats
Complete the game on Hard difficulty.
Russian campaign
On the first tank level in the Russian campaign, it is best to use first person view to shoot the Nazis that have Panzershrecks and MP-40s. The MP-40s cannot hurt you, but are annoying. If you use third person view, you will miss.
Teddy Bear Health
In the stage Surrender at Aachen (Western Front), you will be in an enemy occupied house right from the start. The small room directly across from where you start from has a small teddy bear you may acquire that restores as much health as a circular health kit.
Tractor Factory: Easy completion
When you get up to the sniping area, crouch down in the window. There will be some ammunition and health in the corner
if needed. Get it if desired, then snipe the first wave of soldiers with normal guns. When your comrades say that there are Panzershrecks, concentrate all of your fire there. Do not worry about the regular soldiers because they cannot aim well. Shoot the Panzershrecks until you see a man running up the road with a heavy machine gun. Shoot him then go to the left window and continue.
Unlock FMV sequences
Successfully complete the Russian campaign to unlock the making of 1 FMV sequence. Successfully complete the British campaign to unlock the Making Of 2 FMV sequence. Successfully complete the American campaign to unlock the making of 3 FMV sequence.
Unlockable Extras
Complete the following tasks to unlock various game clips:
Clip - Action
Animation Reel - Open from the start
Artwork - Open from the start
Making of 1 - Complete all Russian levels
Making of 2 - Complete all British levels
Making of 3 - Complete all American levels