S.T.A.L.K.E.R.: Shadow Of Chernobyl Cheats (PC)

While playing the game, press ~ to display the console window. Then, type one of
the following codes and press [Enter] to activate the corresponding cheat function:

Enter the game's folder in the Limited Edition of the game and run the "setup-bp.exe"
file. Select a language, then enter "pseudodog" as a code to unlock the Pool
multiplayer map and the U.K. and U.S. military multiplayer skins. Enter "snork" as
a code to unlock the Dark Valley multiplayer map and the French and German military
multiplayer skins.