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  • World of Warcraft
  • 382,159 Monthly Downloads
  • Supports: 5.4.7
  • 18,132,255 Total Downloads
  • Updated 04/19/2014
  • Created 06/06/2009
  • 9,317 Favorites
  • Project Site
  • Comments
  • Release Type: Release
  • License: GNU General Public License version 3 (GPLv3)
  • Newest File:
Support development! **

About _NPCScan

_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.

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.

SLOKnightfall <>
2014-04-19 08:59:58 -0700

tagging changes


    - Added Portent to the localization files


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  • #1630

    I really get irked when people ASSUME that no one read how to "clear the cache". Im one of those that has read it.. reread it... and read it yet again and STILL get the same message when logging in that I need to clear my cache.

    Dont assume just because someone says they are still having problems that they "didn't read".

    Makes you look like the ass you are.

  • #1621

    Maybe some one already wrote it before but i create a batch file for clearing the cache.

    For Win XP:

    Create a new document file and copy-paste those lines in the document

    cd C:\Program Files\World of Warcraft\Cache\WDB\enUS
    del creaturecache.wdb

    Save the file on your desktop with any name but replace the ".txt" extension by ".bat"

    Ex: NPC_ClrCache.bat

    Double-click the file everytimes you launch WoW.

    Note: To test the batch file, double-click it with the cache folder window open.  You'll see the file disapear.

  • #1670

    You gave a very helpful response. It's so difficult to try and give specifics that work for the majority... I'd add three things:

    1) Check and see where YOUR creaturecache.wdb is. You may need to modify the directory structure given in the above example.

    2.) On most modern Windows machines 'out of the box', you will have to make sure the extensions are not hidden. If they are, the file type will not change when you add a .bat to the file name (and you won't see the '.txt' mentioned in the example.)

    3.) If you are not comfortable with doing the above, don't mess with it. Get a friend who does these minorly-geeky-things to set you up.

  • #1625

    May I suggest rewriting the code as;
    del Cache\WDB\enUS\creaturecache.wdb
    START Launcher.exe

    This WILL require the BAT file to be placed in your WoW installation folder, but will also fix any issues with WoW stored on other hard drives or 64-bit (as most systems are these days).

    Create a shortcut on your desktop, and when it runs the program will delete the cache and also run the launcher for you.

  • #1619

    I have a suggestion to this Addon.

    I think that you shall add a button ingame that automatic clears your cache, that way we dont need to close down wow and manually clear cache and save alot of time.


  • #1617

    I have cleared the cache like 5 times today and it still tells me every rare creature I've seen since install is cached. I deleted the right creaturecache file and all. Still wont reset Cache. I now have almost every rare creature cached, does this mean it wont work at all on those creatures, now rendering this app useless?


  • #1616

    I have 2 account and usually camp on 1 account and do other stuff on another, can you possibly make it so that NPCScan annouce in party that a Rare is found including the time or something similar to that effect. TY

    Last edited by Dreadtor on 11/14/2011 8:28:15 AM
  • #1615

    Does NPCScan communicate with others? because it will say i have cached rares that i now i havnt. JW if its a bug or if it communicates with others. TY

  • #1614
    It's time !

    ... for a new version. NPCscan slowly and surely is *** me off.


    The reasons:

    - no way to set or unset single mobs

    - today: I have NOT deleted the cache, I have NOT marked: show all pathes, and what the tools is doing: showintg me ALL pathes again.

    I think, NPSscan (and overlay) needs a kind of setup with more functions. Functions, which can be manupilated by the users.

  • #1613

    This addon is broken.

  • #1612

    I have used npcscan with good results, but lately it does not give ant warning nor does it show the "cached" rares that are logged. I have also experienced some cached creatures that do not get removed when I delete out the cache from my system.

    Hope you can explain the problem or get it fixed, have loved this add-on.

  • #1611

    Does not work! As other have said it will cache rares that I have NEVER come across and at the same time I can be standing in front of a rare and no warning goes off.

  • #1610

    Hi really love this addon but is it possible to add all the rares to this and seperate them by zones they r found in instead of the continents and let u turn on and off the ones u want? will gladly put $20 for this to happen lol


  • #1609

    hi, is it possible to enlarge the scan-radius?

  • #1604

    I keep having random rares I have NEVER encountered ending up in my cache. I try to delete my cache so I could see them on my map (I have NPCSCAN overlay) but they just keep reappearing.

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