S.T.A.L.K.E.R. - Shadow of Chernobyl
Game folder :
Program Files/THQ/S.T.A.L.K.E.R. - Shadow of Chernobyl
Folder game saves Windows 2000 / XP :
Documents and Settings/All Users/Documents/STALKER-SHOC/savedgames
Folder game saves Windows Vista / 7 :
ProgramData/Documents/STALKER-SHOC/savedgames