To access the debug console, do the following:

1.    In Steam, right click on The Evil Within and select “properties” then under the General tab, hit “set launch options.”
2.    Put this in to unlock the console: +com_allowconsole 1
3.    Once the game has launched, hit the Insert key to bring down the developer console.
These are the commands you can use and some notes about each:
•    R_swapinterval <NUMBER>
o    Sets the FPS lock. Note that the numbers below are negative.
o    -2: This is the default, set to 30 FPS. This is the officially supported frame rate
o    -1: This sets the FPS limit to 60. Fully playable, although there may be quirks (we’re going to fix these).
o    0: This fully unlocks the FPS. We do not recommend playing above 60. We will not fix any issues above 60.
•    God
o    God mode. You are effectively invincible, and certain enemy kill moves will not be used against you (Laura, for example, will not jump on you)
•    Noclip
o    Allows you to walk through walls
•    G_infiniteammo
o    Unlimited ammo (provided you have at least 1 bullet when you enable this)
•    G_stoptime 1
o    Stops time. Note there is a bug right now where using this command causes a UI element to appear on screen. We’re looking to fix that in the near future.
o    Re enable time with g_stoptime 0
•    Toggledebugcamera
o    Separates the camera from Sebastian so you can freely move around the
•    R_forceaspectratio <NUMBER>
o    Sets the aspect ratio. Default is 2.5, which is our official aspect ratio.
o    0 is full screen, but not ideal. 1.8 or 2 is probably most comfortable for those who don’t want bars.
•    Com_showFPS
o    Turns on id’s native FPS counter
•    Startslowmotion2
o    Slows down time
•    Stopslowmotion
o    Disables slow motion