At the settings menu, select cheat codes and enter the following:
God mode- Up, LT, X, LT
All Ammo- Down, Up, Down, Y
All Single Player Levels- Y, Down, RT, Down
Show Location Stats- X, Right, LT, Left
Unlock GS ShaMaN map- Left, LT, X, Left
Unlock EB Cityhunt map- White, Y, X, Black
After starting a new level hit pause then choose settings and Cheat Codes.
Press in sequence;
Up, Left Trigger, X, Left Trigger
The screen will read: "God Mode Toggled"
You will need to enable at the start of every new level. It will not work if you try after loading a "Resume" save.
This will not work on vehicles.
At the start of a level hit pause and enter the settings menu.
Choose Cheat codes and enter the following in sequence.
Down, Up, Down, Y