During the game, press the [TAB] or [~] (tilde) key to bring up the console, where you enter:
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god – God mode
loaded – All weapons
slomo #. # – Game speed (from 0.1 to 1.0)
fly – Flight mode
ghost – Walking through walls
walk – Undo walk through walls
allammo – Full ammunition
Adding characters.
Alanna.
Go to the “Settings” menu located in the main menu of the game, select “Player”, then “Change character”, then “Enter code”: phayder
Ariel.
Go to the “Settings” menu located in the main menu of the game, select “Player”, then “Change character”, then “Enter code”: jihan