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  • World of Warcraft
  • 594,079 Monthly Downloads
  • Supports: 5.4.8
  • 20,762,686 Total Downloads
  • Updated 09/21/2014
  • Created 06/06/2009
  • 9,687 Favorites
  • Project Site
  • Comments
  • Release Type: Release
  • License: GNU General Public License version 3 (GPLv3)
  • Newest File:
Support development! **

About _NPCScan

_NPCScan & Warlords

Due to changes in how the game caches mobs in WoD, it is looking like _NPCScan will no longer be able to auto detect non-Vignette mobs. Due to this the only way to find pre-MoP rares via _NPCScan will be via mouse over or the new dynamic target macro keybind being added. The new keybind will trigger a /targetexact …” macro that updates with tracked mobs based on the zone you are currently in. Vignette mobs will still automatically trigger an alert when the mob gets in range, and should work more reliably due to updates to the Vignette API.

_NPCScan tracks seldom-seen rare mobs by proximity alone, making the old “/targetexact …” macros obsolete. It has the same range as those targeting macros, but you won't have to mash any buttons. Just go about your business and let _NPCScan alert you when it finds something.

V5.x Changes
  • Due to changes in how the addon stores data, some settings might get reset when updating.
  • The default alert is suppressed while on flight paths by default. If a mob is found, the whisper sound effect will play and the mob & location will be placed in the chat log. You can turn this off from the settings.
  • _NPCScan now includes all rare mobs in the game.
  • The "One of Many", "Timeless Champion" & "Champions of Lei Shen" Achievements have been added.
  • Rare Mobs and Tameable Mobs have their own tabs now.
  • Custom mobs have been added for the Ghostly Pandaren Fisherman & Craftsman.
  • Individual mobs can be removed from their tabs to stop tracking them.

If you have a question check the FAQ, or a problem create a ticket

If you have a question/comment about _NPCScan.Overlay please post it in it's comment section.



NPCScan now tracks "vignettes". These are the little skulls appear on the minimap, that denote rare mobs. This is a beta feature and is disabled by default. Enabling this feature will alert you to a rare that's within minimap range, without any worries about having to clear your cache. When you get an alert you will be shown a target button similar to the standard mob alert, letting you know that a vignette mob was detected. Clicking on the target button will try and target the mob. Once a mob is targeted, the target button will update to reflect the mob found.

Known Issues: Currently there is no way to detect what mob the vignette represents. Because of this there is no way to filter out and ignore individual mobs. The vignette tracking will ignore achievement mobs groups that have their tracking turned of via unchecking their tab. Also the targeting button might have some issues if there are more than one vignette mobs in target range and may not work 100% of the time.

The Cache

This addon doesn't use nameplates or mouseover units to find rares. Instead, it checks your creature cache for the moment a rare mob is found. There is one catch to this technique however: Once a mob is “found”, _NPCScan won't be able to find it again until your cache is clearedf you find a rare mob's corpse—Dirkee for example—you would have to clear your cache before _NPCScan would find Dirkee again. Thankfully, clearing your cache is a safe and simple matter.

Clearing Your Cache

To clear your cache, follow these straightforward steps:

  1. Exit World of Warcraft
  2. Delete the “Cache” sub-directory inside your World of Warcraft folder.  For example on a standard Windows XP installation, you would delete the folder “C:\Program Files\World of Warcraft\Cache”.
  • Advanced users can delete “C:\Program Files\World of Warcraft\Cache\WDB\enUS\creaturecache.wdb” specifically to improve log-in times, where enUS is your language code.

Note: Windows Vista and Windows 7 users see this info if your cache isn't in the location above.

That's it. Log in after you've done that and you'd be able to find Dirkee a second time. It's completely safe because WoW will recreate your Cache folder after you log in again.

Cache Warning

If a rare mob is already cached when you log in, _NPCScan will print a warning message with the names of those mobs. If you see this message but still want to find the listed NPCs again, it's time to clear your cache by following the above procedure; Otherwise, you can quit searching for those mobs using the Search options window detailed below. You can suppress this log-in message using the main options pane, as well.

“Found” Alert

When a rare mob is found, _NPCScan alerts you by playing a loud and distinctive sound, making your screen pulse red, and displaying an animated Targeting Button. To get a feel for what this alert looks and sounds like, try the “Test Found Alert” button in the addon's main Interface Options panel. (See the Options section below.)

Targeting Button

When clicked, the targeting button tries to target the most-recently-found mob.  You can also bind a key to hit this button. If the default button position isn't to your liking, you can move it while holding your CTRL key.

Note: The button cannot be shown during combat. In the unlikely case that you do find a rare while fighting, the button will appear after you leave combat. You will still hear the alert however, and the name of the mob will appear in your chat log.


_NPCScan's main options window can be accessed from the Interface Options menu. This panel includes a “Test Found Alert” button, various ways to customize the alert sound, and an option to suppress cache warning messages on log-in. New sounds can be added to the alert sound dropdown menu by installing SharedMedia-type addons.

Search List

The list of mobs that _NPCScan searches for can be modified easily through the Interface Options panel, however it comes pre-configured with most rare Outlands and Northrend mobs.; To access the mob list, type “/npcscan”. Grayed out NPCs in a list aren't being searched for, either because they're cached or not needed for their achievement.

The first tab available lists Custom NPCs that you can enter or remove manually. NPCs that are already cached show a red “X” in the first column. You can add or remove Custom NPCs with the [+] and [-] buttons at the bottom right.

All other tabs control achievements like Bloody Rareand Frostbitten. These tabs show an additional column on the right with green check marks for completed achievement mobs. You may enable or disable tracking each achievement with its tab's checkbox.

To remove non custom mobs from a tab, click on the mob that you want to remove and then click on the "Remove" button. This will remove the selected mob from the current tab and add it to the Ignore List Tab. If you ever want to restore a Ignored Mob, select it from the "Ignore List" tab, click the "Remove" button and it should be added back to its original tab.

The “Search for completed Achievement NPCs” checkbox at the top left of the pane allows you to keep looking for mobs you no longer need for achievements.

Finding NPC IDs

A mob's NPC ID is its unique identification number, and it can be found on sites like WowHead or WowDB For example, search for the mob “Dirkee” on WowHead and go to the mob's page.  That page's URL will look like

32500 is Dirkee's NPC ID.


The only problem mobs for _NPCScan are tamable beasts & Battle Pets. Whenever you run across the tamed version, _NPCScan gets tricked into thinking that mob is nearby. In order to prevent those false positives, _NPCScan only shows alerts for tamable mobs in their original zones That is, if you spot Loque'nahak in Dalaran instead of Sholazar Basin where it usually patrols, _NPCScan would ignore it. When one of these tamable mob false-alarms happens, you'll see a message in your chat window explaining why it got ignored.

Since this makes tamable mobs are so difficult to track, I suggest you fly to the tamable mob's zone first, clear your cache, and then search for it.; Any time you pass through a populated area like Dalaran, you risk filling your cache with popular rare pets.

For Battle Pets there is no way for it to determine if a mob is a spawn or someone's pet. Many Battle Pet addons and just opening the Pet Journal will often cause Battle Pets to become cached.

James D. Callahan III <>
2014-09-21 01:07:39 -0500


James D. Callahan III:
    - Added global Show Alerts As Toast option; displays the alert text as a persistent (and dismissible) toast rather than printing it to the chat log. Defaults to enabled.


First Previous Page 54 of 150 Next Last
  • #1981

    I cleaned ALL npc and npc overlay from all my saved vars, folders etc, reinstalled a new download of both and it works

    One man one brain, 2 men 1/2 a brain, 3 brains

  • #1974

    so im having a weird issue- npcscan seems to be going off in the wrong area- for example if im looking for MISTER FEROCIOUS it will go off in the area next to where he would spawn and not in the area where he does spawn. it seems to be offset somehow.

  • #1975

    thats a delay from the different phases,lots of peopel having that same issue its actually locating the rare wheres he is at but with the delay its not going of until you fly past it.still having issue with mod not working at all for me.even tried using olderr versions still nothing.woudl be great if we can get this mod working again for all

  • #1971
    Addon not working anymore for me like others said.Delete cache reinstalled it the whole 9.think this mod perhaps needs a update
  • #1973

    Yo brain needs an update

  • #1970

    Hi, anyone else experiencing error messages after deleting their creaturecache.wdb file? I get the spammed heaps of errors after I login after deleting the file. Since the error messages are all about critter and land mount, this is what is sort of looks like but repeated heaps of times with different IDs:

    Max CRITTER is 229
    Error for CRITTER 232 at menu build, ID: nil, name: nil, spellID: nil

    Max LAND MOUNT is 124
    Error for MOUNT 115 at menu build, ID: 38695, name: nil, spellID: 72807

  • #1972

    I forgot to mention that npcscan still works for me.. just the spammed errors are bit concerning. 

  • #1964
    Re: _NPCScan: screen flash, sound and 3d model not showing up

    Guys anyone run into this?

    If I pass by a rare it goes directly to cache do not pass go do not collect 200$ ... doesn't matter which zone.  Never alerts, flashes the screen, sound nothing ... but, like I say the odd thing is, I check my empty cache (yes after deleting it) zip ... straight to cache. (yup these rares are alive).  It was working though and yes went through the regular steps of removing adding it ... killing wtf and cache.

    Appreciate the add on though it's a tremendous utility.


  • #1965

    Same problem here.

    Already cleaned cache folder (the game shows that no npc is already cached), but when I find a rare npc, it just marks on the addon menu and doesn't sound that alert (nor shows the npc model in the screen).

  • #1969

    Did you already try deleting the _NPCScan folder from your World of Warcraft\Interface\AddOns folder and reinstalling the addon?

    Of coarse have wow closed out while your doing this.

    Last edited by SpykerX07 on 11/5/2012 8:21:48 AM
  • #1960
    Delete Creature cache and start WoW :D

    Wrote a batch file that deletes the Creature cache then starts up WoW. Thanks for the awesome Addon :D  Cool

    This is just an example of how I did it with quick explanation.

    Create a new Notepad,

    Enter in these lines exactly and change the cd directories to fit your creature cache file and wow.exe locations.

    @echo off
    Rem Creaturecache
    cd C:\Users\YOUR USER NAME\World of Warcraft\Cache\WDB\enUS
    del creaturecache.wdb
    Rem WoW
    cd C:\Users\YOUR USER NAME\World of Warcraft
    start World_of_Warcraft_Launcher.exe

    Save As, whatever you want the file name to be.bat to your desktop.

    Make sure you save as .bat and not a .txt file or else it wont work.

    Now Open the .bat file and voilà, Creature Cache is reset and wow starts up.

    Last edited by SpykerX07 on 11/4/2012 10:15:18 AM
  • #1977

    you are patially right but a lot of people install there wow not in user folder so something like this

    C:\Program Files (x86)\World of Warcraft\Cache\WDB\enUS

    Also I noticed all that pops up is another CMD window.

    Last edited by Rane88 on 11/10/2012 11:08:01 AM
  • #1980


    I posted for that file location as well. please read further posts.

    Plus I also mentioned to modify the cd directories to match your own personal location.

    Last edited by SpykerX07 on 11/11/2012 12:14:10 PM
  • #1961

    Not working I get "cannot find World_of_Warcraft_Launcher.exe"

    Using Win7 64-bit

    @echo off
    Rem Creaturecache
    cd C:\Program Files (x86)\World of Warcraft\Cache\WDB\enUS
    del creaturecache.wdb
    Rem WoW
    cd C:\Program Files (x86)\World of Warcraft
    start World_of_Warcraft_Launcher.exe

  • #1978

    I actually figured that out but didn't feel like changing what I had already posted >.>

    Regardless, modify the syntax however you like, was just posting because I was feeling generous.
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