Hunted: The Demon's Forge Cheats :
Unlockable - Adventure + Mode, Old School Mode, and Cheat List
Beat the game on any difficulty and return to the main menu.
Adventure Plus is available under the "Adventure" menu item. (Look at the bottom of your screen) When you start Adventure + you lose all story progress including all stats except gold collected. You also start with an upgraded starter bow and sword (main weapons for E'lara and Caddock).
Old School Mode (Very Hard Difficulty) is unlocked after returning to the main menu.
Extras become available upon the start of Adventure Plus. To access these "cheats" go to Special Features in the Main Menu. Here is a list of Extras: