All credit to precipitator on moddb.com
https://www.moddb.com/members/precipitator

More people need to know about this awesome mod so im posting it here.

Make sure to download the latest version of both.

See 17:08 for a video format of the text guide provided below.


Guide copy pasted from the "MESM Readme.txt" file within the Monstrum_Extended_Settings_Mod compresed folder
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Installation Instructions (Read very carefully):
1. Extract and move the contents of this folder to the root folder / directory of the Monstrum game on your computer. This is where the .exe file of the game is located. You can access this via Steam by clicking on the settings of the game and choosing "Browse local files".

2. Download "PartialityLauncher.zip" from https://github.com/DmitriySalnikov/PartialityLauncher/releases . You may have to click on the title of the latest version or on the Assets drop down menu if you do not see the file. Alternatively, you can download the older but official version of Partiality from the same URL. The older version is what is covered in the video tutorials, but the newer version has an interface that may be easier to use.

3. Extract Partiality to a memorable place on your computer.

4. If you are using the new Partiality, launch the executable file called "PartialityLauncher" inside the Partiality folder. If you are using the old Partiality, launch the batch file called "Partiality Launcher" inside the Partiality folder.

5. Press on "File" and "Open Game" in the top left corner of the window.

6. Navigate to Monstrum's root folder / directory and double click on the executable file called "Monstrum".

7. Tick the box for "MonstrumExtendedSettingsMod.dll".

8. Press "Apply Mods & Patches" [New] / "Apply Mods" [Old] at the bottom of the window and wait until the window "Mod results" appears.

See 4:39 for using the mod


Edit the "modSettings.txt" file which was extracted into yourt onstrum install directory and change the variables to your hearts desire.

The first line of each setting will tell you what the setting is and what its default value is, while any following lines are used by the game. Editing the default value shown does nothing. The default settings emulate an unmodded game. Creating or deleting lines will break the mod. If the game stops reading your settings correctly, download the mod again to get a clean settings file.

Maximum Value On FOV Slider - Allows you to customise your FOV Slider. Set minimum to -180 and maximum to 180 for full range of FOVs. This sets the maximum value of the FOV slider. - Default = 70
Change value from 70 to desired FOV

Skip Splash Screen - Will skip the splash screen on startup but not start a new round immediately. - Default = False
Change value from False to True

Within "modSettings.txt" settings are divided into categories:
Monster Settings
Gamemode Settings
Player Settings
Level Generation Settings
Item Settings
Colour Settings
Utility Settings

Some of the variables more interesting than others so i will cover some of the interesting ones here
With the most interesting being adding Sparkie to the game, a pre-alpha monstrer who was removed due to being too large to move through the corridors of the ship.
Read more about Sparky on the wiki[themonstrum.fandom.com]
Unfortunately this is an early implementation: Currently it is just a Brute with slightly modified behaviour.



Monster Settings:
Number of Random Monsters - The number of randomly chosen monsters to spawn. These randomly chosen monsters are spawned additionally alongside monsters to spawn specified by type. - Default = 1
1
Number of Brutes - The number of Brutes to spawn. - Default = 0
0
Number of Hunters - The number of Hunters to spawn. - Default = 0
0
Number of Fiends - The number of Fiends to spawn. - Default = 0
0
Number of Sparkies - The number of Sparkies to spawn. Requires the Add Sparky To The Game setting to be enabled. - Default = 0
0
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Add Sparky To The Game - Adds an interpretation of the pre-alpha monster called Sparky to the game as a possible monster. Early implementation: Currently it is just a Brute with slightly modified behaviour. Requires a restart to change. - Default = False
False
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Force Many Monsters Mode- Forces the game to start with Many Monsters Mode active. This lets features be used that randomise or add to monster counts without starting with 2 monsters. - Default = False
False
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Gamemode Settings:
Enable Multiplayer Mode - Local co-op multiplayer that can be played online via programs such as Parsec. The first player uses the keyboard and the second a controller. Can be played split screen or with two monitors if two monitors using the same resolution are connected and the use multiple displays option is enabled. If a player were to die normally, they are downed instead and can be revived by throwing a smashable onto them. Requires a restart to change. - Default = False
False
Enable Crew VS Monster Mode - Lets the second player control the monster. Each monster has a unique ability that the monster player can use with the crouch button. Hunter can double tap to use their ability differently while in hiding or trapping. Hiding spots can be searched with the jump button. Requires a restart to change and multiplayer to be enabled. The AI can be given back control by pressing the journal button, which lets the normal AI be spectated. - Default = False
False
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Dark Ship - Almost all lights on the ship are turned off. Combines well with the Fiend. - Default = False
False
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Randomiser Mode - Randomises which settings are used and what they are set to. - Default = False
False
Chaos Multiplier - Increases or decreases the probability of settings being used and the magnitude of each setting. - Default = 1
1
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Level Generation Settings
Diverse Item Spawns - Allows items to be spawned in regions they may not previously have been found. - Default = False
False
Spawn Items Anywhere - Allows items to be spawned in any valid spot. - Default = False
False
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Utility Settings:
Enable Mod - Disables the mod the next time the game is started. The mod must be enabled again by manually editing or deleting the modSettings file. This setting can be found by scrolling down to the Utility Settings category. - Default = True
True
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Enable Debug Mode - Use G to toggle invincibility / god mode. Enables noclip using U, H, J & K, which can be toggled on and off using V. While noclip is on you will receive no fall damage. Use R, T & Y/Z to spawn an additional Brute, Hunter and Fiend. Use B, N & M to force a chase, force stop a chase and burn hunters / force them to retreat. Use comma and period to activate and deactivate monsters. Use I, O & P to fix the liferaft, helicopter and submersible. Allows for cloning of a radio and two walkie talkies with L and fuses with semicolon [GB/US] or Ü [DE]. Use apostrophe or hashtag to teleport all items to you. Removes jump cooldown to allow moon jumping. - Default = False
False