Drug Effects - AI Combat Dynamic Enhancement (Updated)

Experience enhanced chaos with Fallout 4's Chemistry Fusion: AI Combat Dynamics. Watch as AI opponents adjust their fighting style based on weapon selection and chemical consumption, injecting thrilling unpredictability into every battle.

Original address:

Prefix:

Items used by NPC (strongly recommended to be used together):

RobCo Patcher：

Updated Chinese address on December 3:

Updated on September 21, 2026:

Version 1.2.3

Overview

-> Removed the flanking behavior of melee NPCs, causing them to flee and re-engage

Updated on February 18, 24:

Version 1.2.2

Bug fix

-> Fixed a bug that caused unarmed melee combat to be more deadly than intended.

Version 1.2.1 updated on August 11th:

conventional

-> When enemies swap weapons, they will now recheck the weapon they swapped and adjust their behavior to suit that weapon

bug fixes

-> Fixed a bug that turned laser weapon users into fist fighters.

NEW] Factions (can be switched using MCM)

-> Added faction specific behavior

->Strategy

-> Super Mutants

->Synth

conventional

-> Adjusted several behaviors to balance them with the new faction profiles

-> Improved accuracy for shotgun users.

RobCo Patcher

-> Added Super Mutants

-> Added synths

bug fixes

-> Fixed some form IDs

Update 1.1 on August 10th: for weapon behavior

-> Added new behavior, sniper

-> Added 6 new sniping behaviors

What does drug influence do?

Drug Influence is a dynamic Fallout 4 mod that revolutionizes combat interactions. This innovative modification enhances AI behavior by integrating two key factors: chemical usage and weapon selection. With Chemfluence, AI characters can not only respond to chemical consumption with unique combat strategies, but also adjust their tactics based on the weapons they use. Ranged weapon users keep their distance, shotgun enthusiasts get in close for impactful shots, and melee combatants display a variety of behaviors such as flanking, aggressive attacks, or skillful defensive moves. This mod increases the realism and unpredictability of combat, making each engagement a unique strategic experience.

Different weapons determine combat style

Drug effects introduce several new fighting styles for NPCs, which are randomly selected for each NPC and vary based on the type of drug used.

Melee weapons

Four new combat behaviors. This will spice up your melee combat experience, as different raiders can behave differently. Some people like to block and counterattack. Others are more aggressive. Some people like to flank before attacking.

Ranged weapons

Five new combat behaviors. They like to attack you based on different weapon ranges. Some NPCs like to get close. Some may stay further away and prefer to snipe you. Others may not care about their bullets, shooting more aggressively but less accurately, while others take their time getting more precise shots at you.

Shotgun Weapons

Three new combat behaviors. When he spots you for the first time, he will randomly blind-shoot you, and then approach you for a head-on attack.

Different drug types determine combat styles

The use of different drugs by NPCs can affect their combat behavior and also affect their abilities.

Melee

Psycho, Psychobuff, Buffout, MedX will make melee attackers more aggressive and enhance their combat skills.

PsychoJet, Psychotats, Mentats, Jet, XCell will make melee attackers more defensive and they will try to track and outflank you.

Ranged weapons

Psychobuff, XCell, Buffout, MedX will make them more aggressive towards you, but will also take cover if needed.

Psycho, Psychotats, PsychoJet, will make them more aggressive towards you, but they don't care much about cover.

Jets, Mentats, will make them less aggressive, but more accurate for shooting at long range.

Additional combat behavior

Another new combat behavior is retreat and cover. When an NPC is injured, you can set a health value and a chance that they will try to retreat/evade you and find a nearby bunker to stren …