Realistic Human NPC AI

Realistic Human NPC AI

A complete overhaul of human NPC combat behavior in State of Decay 2

Overview

Undead Labs designed the human NPC AI with deliberate handicaps so the game stays accessible on Standard difficulty. NPCs only perceive enemies at ~30m, ignore who's actually attacking them, almost never dodge, forget targets in 5 seconds, and followers abandon fights the moment you move. This mod fixes all of that.

27 properties, 9 vanilla files, zero impact on the player or zombies. Human NPC behavior only.

What it changes

Perception and engagement range

• []NPCs perceive hostiles at ~90m (vanilla: ~30m) — the "blind past 30m" problem is gone[/]

  []Aggro range matches perception so they actually engage what they see[/]

  []Long-range overwatch extended for sniper-style behavior[/]

  []Peripheral vision standardized at 160° (vanilla was inconsistent: 120° in some nodes, 180° in others)[/]

  []Close-proximity awareness expanded from 2. 5m to 6m[/]

  Threat prioritization

  • []The closest enemy is now the priority — no more ignoring the zombie biting them to shoot something 200m away[/]

    []Whoever is actively attacking the NPC becomes the target (vanilla weight was almost zero)[/]

    []NPCs react to gunfire direction, not only to hits taken[/]

    []Hostile humans properly ranked against zombie threats (vanilla ranked Bloater above an armed human)[/]

    []Wounded or out-of-stamina targets get tactical priority for finishing[/]

    Reactive combat

    • []NPCs actually dodge incoming fire (vanilla dodge chance was barely functional)[/]

      []Dodge cooldown reduced for continuous reaction, no spam[/]

      []Earlier dodge response to telegraphed zombie attacks[/]

      []NPCs prefer ranged engagement at distance instead of closing for melee when they have a gun[/]

      Target memory

      • []NPCs remember lost targets for 20s instead of 5s[/]

        []They investigate the last known position for longer[/]

        []In defend mode, active threats stay tracked for 40s instead of 10s[/]

        Follower behavior

        • []Followers no longer abandon a fight just because you moved — leash extended from ~9m to ~25m[/]

          []They engage hostiles around them properly, instead of only at 2. 5m as in vanilla[/]

          []Pursue enemies farther without giving up to return to you[/]

          []Maintain more distance from zombie hordes to avoid being swarmed[/]

          Combat flow

          • []Decisive retreat distance increased so NPCs actually leave a bad situation when they should[/]

            []Smarter spacing against zombie hordes[/]

            []Improved hazard awareness (fire, gas)[/]

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            What it does NOT change

            • []The player — zero modifications. The player uses a separate controller; none of the modified properties exist for the player.[/]

              []Zombies — all zombie controllers (Feral, Juggernaut, Bloater, Screamer, common) are vanilla.[/]

              []Navigation and pathfinding — global systems untouched.[/]

              []Stealth, finishers, melee mechanics — vanilla.[/]

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              Installation

              Download the .pak file and place it in one of the following locations (press Win+R, paste the path, and hit Enter):

              • []Steam / Epic:

                %LocalAppData%\StateOfDecay2\Saved\Paks[/]

                []Microsoft Store / Game Pass:

                %LocalAppData%\Packages\Microsoft. Dayton_8wekyb3d8bbwe\LocalCache\Local\StateOfDecay2\Saved\Paks[/]

                If the Paks folder doesn't exist, create it.

                To uninstall, simply delete the .pak file.

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                Compatibility

                []Compatible with Update 38. 2 of State of Decay 2.[/]

                []Not compatible with other mods that edit the same core human AI files (AIController_Human, AITree_HumanCombat, etc.) — if two mods edit the same file, one will simply override the other. Use only one human AI mod at a time.[/]

                []Fully compatible with mods that edit ot