The debug console in Witcher 3 can be accessed via a mod at Nexusmods. There are a lot of commands available to add items, spawn monsters and to do other fun things. The information on this page is gathered from the comments on the mod-page and from my own research. Thought it would be convenient to gather the commands like this. You are welcome to contribute to this list.
XCOM 2 Soldier Booster and Classchange
XCom 2 Character Booster. Simply enter the name of your Soldier and select a class. The script will return the console commands that you need to enter to buff your soldier.
Witcher 3: Debug Console fixed for 1.05
The Witcher 3 Debug Console has been fixed for Game Version 1.05 at Nexusmods.
Witcher 3: Geralt and Ciri Savegame
As requested I created a savegame at White Orchard (after the first scene in Kaer Mohren) with Geralt and Ciri. Geralt is at Level 70, with Set Armor, Swords Mutagens, Glyphs and Runes. Ciri has all abilities, Charge, Blink, Rage, Meteor and various Quest Buffs.
Witcher 3: How to play as Ciri
Now that the debug console in Witcher 3 can be accessed, it is time to have some fun with it 🙂 Here is how to play as Ciri including her special abilities.
Witcher 3: Fast Travels and World Changes
Now that the debug console in Witcher 3 can be accessed, it is time to have some fun with it 🙂 To portal to certain locations in the game use these commands.