Before You start keep in mind You'll be changing files so make a backup copy before You start. Now, open the ge3.ini file in the "Gothic3/Ini" folder and change the following line in Notepad:
To use the following codes press tilde key [~] while playing to bring up the console then type the desired one:
God - God mode
Invisibility - Invisibility mode
Teach all - Learn all skills (lowers stats to 0)
Kill - Kills selected target
Give <item> - Gives specified item
Spawn <item> - Spawns specified item/creature
Remove Autoupdate from the Game Start
Right-click on "Launch Gothic III" desktop shortcut, and select "Properties". Change target to "C:\Program Files\Gothic III\Gothic3.exe". You can run autoupdate manually by going to C:\Program Files\Gothic III\ and clicking on kupdate.exe (or make a shortcut to this app.)
Remove Intro Movie
Go to "C:\Program Files\Gothic III\Ini\", open logo.ini file using Notepad, and remove all the entries from it.
You may also want to delete "G3_Intro.bik" to remove the actual game intro. This can be found in C:\Program Files\Gothic III\Data\Video or whatever your game installationion directories path is. I left "G3_Intro.bik" alone because it can be quickly skipped by pressing the esc key. G3_Credits.bik also can be removed if desired.