Cheat List:
These codes only work after the game is cleared. Start any mission and press ESC to pause the game. Hold LEFT SHIFT + LEFT CTRL + LEFT ALT then enter the following numbers on the NUMPAD:

Restore health - 7755
Perfect mode - 5964
Always devastating - 6869
All upgrades - 8967
Infinite ammo - 7795
God Mode - 7578
Targeting mode - 9587
Submitted by - mohd aIMan- gangsTa

Unlock Four-Hit Combo For Aragorn:
Pause the game and enter 8, 7, 6, 9.

Unlock Gandalf's Level 4 Attacks and Abilities:
Go to the pause screen and hold the Left CTRL, ALT, and SHIFT keys. Then input the numeric sequence: 6, 8, 7, 4 on the number pad (while holding the other buttons). Then release the buttons. You will hear a metallic clink sound to confirm your cheat was accepted.