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Xbox 360 - Call of Duty 2 cheats

Select any levels:
Hold LB + RB then quickly press Left, Left, Right, Right, Y, Y at the mission 
selection screen.

Get Xbox Live gamescore points:
Complete the followings to unlock the indicated number of Gamerscore points:

Complete training mode - 50 pts.
Veteran of Crossing the Rhine - 60 pts.
Veteran of D-Day - 60 pts.
Veteran of El Alamein - 60 pts.
Veteran of Fortress Stalingrad - 60 pts.
Veteran of Hill 400 - 60 pts.
Veteran of Rommel's Last Stand - 60 pts.
Veteran of Stalingrad 42 - 60 pts.
Veteran of the Battle for Caen - 60 pts.
Veteran of the Tank Squadrons - 60 pts.
Veteran of the Winter War - 60 pts.
Won The War (game completed) - 150 pts.
War Hardened (game completed on Hard or Veteran) - 200 pts. 
(Max 1000 total possible pts.).