Call of Duty: Modern Warfare 2
Game folder :
Program Files/Steam/steamapps/common/call of duty modern warfare 2
Folder game saves Windows 2000 / XP :
Program Files/Steam/steamapps/common/call of duty modern warfare 2/players
Folder game saves Windows Vista / 7 :
Program Files/Steam/steamapps/common/call of duty modern warfare 2/players