First, you will need to find the configuration file for Legend of Grimrock 2.

• Navigate to Documents/Almost Human/Legend of Grimrock 2
  
• Open grimrock.cfg in a text editor of your choice
  
• Search for "console" (lines 27 and 28) and edit the two lines to look as follows:
  
  console = true consoleKey = 192
• Alternatively, "consoleKey" can be left at the value 220, which is the \ | key.

Now when you are in-game or in the dungeon editor you will be able to open the console by hitting the ` ~ key on your keyboard.

For a list of other possible keys to put the console key on, check out this page:

http://www.indigorose.com/webhelp/tu/Program_Reference/Misc/Virtual_Key_Codes.htm

Find the key you want in the character column on the right, and use the corresponding number in the decimal column.

In choosing a key for the in-game console, be sure to avoid any conflicting usages of a key, i.e. you don't want to put it on the W key, as it would open and close every time you try to move forward in the game.

To be able to edit your characters you must be in game. Find a safe place that you can sit and not worry about being attacked.

First, you will need to determine which character you would like to change. The characters are laid out in the UI as below:


Note which number corresponds to the character you wish to alter. Now, you will want to open the in-game console with the ~ or \ key as you defined in the config file. In the commands below, replace the capital X with the number of your character (e.g. getChampion(3) will use your 3rd character).

Copy and paste the commands into the console in-game and edit them as needed. Replace the italicized text at the end with one of the options listed.

Note: Commands and options are case sensitive. If you get an error saying something about "nil value" check all case, make sure options that should be in quotes are in quotes, and make sure you have the proper characters in the right place, such as the colons.

Definition:
Disables a character completely. The character will appear as an empty slot, but can be re-enabled at any time. Can also be used to create a new character if a slot was left empty at character creation.

Options:
false - Will disable an existing character.
true - Will re-enable a character or create a blank level 1 Human Fighter if used on an empty slot.

Example:

Definition:
Sets the name of a character. Note that the enclosing quotation marks are required.

Options:
Any text string. Limit of 20 characters.

Example:

Definition:
Sets the race of the character.

Options:
"human", "minotaur", "lizardman", "insectoid", or "ratling"

Example:

Definition:
Sets the class of the character. Note: Does not change stats or skills.

Options:
"alchemist", "barbarian", "battle_mage", "fighter", "knight", "rogue", or "wizard"

Example:

Definition:
Sets the sex of the character. Note: Only changes the voice of the sounds the characters make in-game.

Options:
"male" or "female"

Example:


Options:
race: human, minotaur, insectoid, lizardman or ratling
gender: male, or female
xx: 01 to 07 for all humans, 01 to 06 for male ratlings, 01 to 04 for everything else
NOTE: choosing a portrait that did not exist crashed my game. Always be sure to save before making changes, and choose only portraits that exist.

I have not tested it yet, but I believe that you can create a custom portrait, drop it in the appropriate folder, and name it whatever you want. Then instead of using the file name as I've described here, simply use your custom one.

Example:

Credit for how to change your portrait is given to Dr.Disaster


That covers all of the relevant commands for changing the character itself.

Example:

Definition:
Gives just enough experience points to get to the next level.

Options:
No options.

Example:

Definition:
Gives the character the indicated number of skill points.

Options:
Any number. Only 80 skill points are needed to level every skill from 0 to 5.

Example:

Definition:
This command increases or decreases a given skill by a certain number of points.

Options:

• skill: "accuracy", "air_magic", "alchemy", "armors", "athletics", "critical", "concentration", "dodge", "earth_magic", "fire_magic", "firearms", "heavy_weapons", "light_weapons", "missile_weapons", "throwing", "water_magic"
  
• levels: Number in levels to increase or decrease skill. If a negative number is used, the skill level will be decreased, and a positive number will increase the skill level. If decreasing, leave out the final option or make it false to refund the skill points used.
  
• dontSpendPoints (optional):
  true - Doesn't use character's skill points.
  false - Removes from skill points the number of levels indicated in command.
  Defaults to false.

Example:
Increase level
Decrease level

Add trait
Remove trait

Example:
Add trait
Remove trait