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  • World of Warcraft
  • 543,813 Monthly Downloads
  • Supports: 5.4.8
  • 20,666,068 Total Downloads
  • Updated 08/25/2014
  • Created 06/06/2009
  • 9,672 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 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 <>
2014-08-25 19:12:48 -0500


James D. Callahan III:
    - Moved CacheWarnings option to global from per-character.
    - Cleanups
    - Removed commented-out code.


First Previous Page 102 of 150 Next Last
  • #1212
    Blizzard and the link you posted for clearing the cache on windows vista dont work for me can u pls help me?
  • #1210
    I get Blazewing alerts in Org alot. Is this caused by Ashes of Al'ar mount?
  • #1211
    Blazewing is bugged at the moment. One of his abilities has a 50000 yard range and hits everyone on Kalimdor, which caches him and sets off _NPCScan. Hopefully Blizzard will fix it in a patch, since the only way I can fix the alerts is to remove Blazewing entirely.
  • #1207
    Silver Dragon does NOT alert you when you pass an already-tamed rare mob. Why can't NPCScan tell the difference? I use both, just in case, because of that.
  • #1209
    SilverDragon checks the cache, your target, and nameplates. When a tamable mob is already cached, SilverDragon starts using only targets and nameplates to find it. Essentially, it ignores the cache when dealing with tamable rares, which is why it differs from _NPCScan. This prevents false positives, but it also limits how easily you can find tamable rares with it in the wild.
  • #1206
    How do I use this? I installed it but I don't see a search button... Does its just automatically search for everything once its installed?
  • #1208
    By default it should scan for most Outlands, Northrend, and 80+ Cataclysm rares. You can bring up the list of tracked mobs with "/scan".
  • #1203
    Question: Is this mod suppose to not only find the rare but also target it too? If yes, mine does not target, it only puts up the found box/pop up with picture and sound, but no target. Makes actually finding them rather difficult when they are not highlighted.

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

  • #1204
    _NPCScan can't automatically target the rare, but the found pop-up will target the rare when you click on it. There's also a keybind to target the most recently found mob, if you prefer that.
  • #1202

    Maybe someone else has asked this (okay, probably they have)...since a grayed-out name means that NPC is not being searched for, is clearing your cache the only way to un-gray the name? I ask only because the NPCs I'm actively hoping to find are not listed as being cached when I log in to the I was curious why they would be gray?
  • #1205
    There are a couple other reasons why mobs might be grayed out other than the cache. One reason is that they're on a different continent, and they aren't being tracked at that moment. For example, if you're on Kalimdor and you check the Northrend mobs tab, they will all appear grayed out until you go to Northrend. One other possibility is if you already have achievement credit for a mob and the "Search for completed Achievement NPCs" option is disabled, those completed mobs will appear grayed out.
  • #1201
    There is a major feature we could all use in this addon: the time logging of when an NPC is found. This would allow players to determine spawn/respawn timers for most of the rare spawns we are all searching. Not sure if it could output to a file but that would be great!
  • #1200
    I was out in storm peaks searching for the Time Lost Proto Drake the other rare drake out there came up but the picture it shows was not showing correctly it was not sized up correctly
  • #1199
    Here's an applescript to delete creaturecache.wdb. The last line is to launch WoW and is optional. Save it as an application for easy use.

    tell application "Finder"
    repeat with l in folder "Cache:WDB" of folder of application file id "com.blizzard.worldofwarcraft"
    if exists item "creaturecache.wdb" of l then
    do shell script "rm " & (quoted form of POSIX path of (item "creaturecache.wdb" of l as alias))
    end if
    end repeat
    end tell
    tell application "World of Warcraft" to run
  • #1196
    Since Terrorpene is now searched for by default and also is tamable, the following should be added to the _NPCScan.TamableIDs.lua:

    [ 50058 ] = 606; -- "Terrorpene" from Mount Hyjal
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