Cheat Codes
     Modify  your existing [install directory]\episodic\cfg\config.cfg
file  (with  Notepad)  and  change  con_enable  to  "1"  to enable the
console.  While  you  are  there,  check  which  key  is  bound to the
toggleconsole command and press this button once you get into the game
in  order to access the console. The key is probably [`] (tilde). Once
in the console, type sv_cheats 1 to enable cheat mode. Once cheat mode
is  enabled,  the  game will allow you to use the developer's official
cheat codes and the debug menu (SHIFT + F1).

Cheat code:             Result:
sv_cheats 1             Enable Cheat Mode
sv_cheats 0             Disable Cheat Mode
ai_disable              Toggle Enemy AI
buddha                  Player Takes Damage But Won't Die
god                     God Mode
hurtme #                Decrease Health by #
impulse 101             All Weapons and Ammo
noclip                  No Clipping Mode
notarget                Invisibility
ch_createairboat        Spawn Airboat
ch_createjeep           Spawn Jeep
mat_wireframe 1         Wireframe Mode
sv_noclipduringpause 1  No Clipping During Pause
sv_infinite_aux_power 1 Unlimited Auxillary Power
showtriggers 0          Show Trigger Brushes

Unlock All Chapters
     Modify   your  [install  directory]\episodic\cfg\config.cfg  file
(with Notepad) and change sv_unlockedchapters to "6".