Inspired by Fallout 76, this mod adds a mutation system to Fallout 4 with some ideas of my own. I realised at the last minute that there is another mod out there that does the same, but I worked on this for a while so decided to share.


Description

By default, any time you go to sleep with 100 rads or more there is a 25 percent chance of a random mutation occurring. These numbers can be adjusted to whatever you like in the mod configuration menu.

You can only have one mutation at a time, and all are permanent until removed with Anti-Mutagen Agent. Anti-Mutagen Agent can be crafted at a chemistry station, purchased from doctors or found as loot, allowing you to instantly remove your current mutation. Like RadAway, it will also cause fatigue and immunodeficiency for a short time in Survival Mode.

Serums containing each mutation can be also be purchased from doctors, although they are rare and expensive. Injecting yourself with one will give you that particular mutation right away. Watch out! If you already have a mutation, the serum will (quite gruesomely) kill you!


The Mutations

There are currently 10 different mutations available, each with positive and negative effects. Not all of Fallout 76's were implemented as they either don't quite fit in singleplayer or aren't possible without causing mod conflicts, messing with Survival Mode scripts, etc.

• Egg Head: +6 INT, -3 STR and END
  

• Eagle Eyes: +25% Critical Damage, +4 PER, -4 STR
  

• Healing Factor: HP regenerates (stacks with regenerative perks), -55% Chem Duration
  

• Fly Person: Bloodbugs, Stingwings and Bloatflies won't attack you, but you take +50% more damage
  

• Marsupial: +30 Carry Weight, increased Jump Height, -4 INT
  

• Scaly Skin: +30 Damage and Energy Resistances, -50 Action Points
  

• Smasher: +50% Melee Weapon Damage, -75% Gun Accuracy, -2 AGI
  

• Speedster: +35% Reload Speed, +25% Movement Speed, slower AP Regeneration
  

• Electrically Charged: 25% chance to electrocute melee attackers for high damage, but you also receive some minor damage when it happens
  

• Adrenal Reaction: +35% damage at low HP, -50 Max HP
  

Installation / Uninstallation

Using a mod manager is recommended for installation, but to install manually, extract the archive and place the Data folder into your Fallout 4 directory.

Before removing the mod from your load order, use the "kill the mod" function inside its mod configuration menu. This will remove your current mutation, kill all of the mod's scripts and create a fresh save, allowing the mod to be deleted without causing damage to your playthrough.