Select “Options” at the main menu, then select “Extras”.
Red Faction: Guerrilla: Cheat Codes Free Download
Select the “Enter Code”
option, then enter one of the following case-sensitive codes to activate the
corresponding cheat function. Enabling codes will prevent the game from being
saved.
Gold Hammer:
Enter HARDHITTER as a code.
Gamestop Wrecking Crew Maps:
Enter MAPMAYHEM as a code.