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  • World of Warcraft
  • 543,368 Monthly Downloads
  • Supports: 5.4.8
  • 20,677,031 Total Downloads
  • Updated 08/25/2014
  • Created 06/06/2009
  • 9,673 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 100 of 150 Next Last
  • #1262
    For anyone who downloaded this file before January 12th, please redownload it using the link above.

    I accidentally... switched Kalimdor and Eastern Kingdoms...
  • #1231
    The link for how to clear your cache in Win7 and Vista just brings me to Could you put the info in here please?
  • #1234
    I currently use Vista, and can find my Cache in:

    C:\Users\Public\Games\World of Warcraft

    It all depends on where you installed WoW at.

    An easier way - Find where you install Addons at, your Cache Folder will be in the WoW Directory there.
  • #1236
    Perfect, thanks. From the fact it was linked I was expecting something more complicated!
  • #1242
    There are two possibilities for where the cache might be on Windows Vista/7, the other one being the VirtualStore. That's a bit harder to find, but a lot more rare.

    Now to find a link to an explanation on the new forums...
  • #1260
    finally found it on my system:

    C:\Users\\AppData\Local\VirtualStore\Program Files\World of Warcraft\Cache\WDB\enUS
  • #1230
    Why do i *not* have to reset my cache? I tested out npcscan on a random mob. Npc scan finds it and alerts me. The next day when i flew near that area again it alerted me... again. I've been meaning to do real testing to see if it will do it again right away or if it only does it again after a day or sol. anyone see anything like this before?
  • #1241
    If you get alerted again each time after you restart the game, WoW might be having trouble saving the updated cache. Sounds like a nice feature if that's the case. ;)

    Another possibility is that your cache was automatically reset when Blizzard released a patch, but I haven't noticed one in a while.
  • #1227
    Hey, love this addon! However I seem to have run into a problem. Like others i'm on the hunt for TLPD. I've spotted Vara 3 times now. The first time the alert went off with no problem. However, the last two times I only knew Vara was there because of her loud wings flapping. After the kills I check the interface and sure enough she's X'd out in the cache (i make sure each time i sit down that the cache has been cleared and there is no X). Now, i am windowed-fullscreen, and do have that unmuted box check, as well as have the box checked to play sounds even while WoW is in the background. As i've been windowed each time, i can't tell if the warning animation played but no sound, or if it simply didn't play at all. What am I doing wrong? Windows Vista 64 bit. Always remove creature cache file before logging in. Any help appreciated as i don't expect i'll always catch the wing flaps to alert me! Thanks! P.S - Now that i think of it, had the NPCscan gone off, the targetting plate to click target would have remained until i manually clicked the close box, no? No such target window comes up, with the exception of during the "Test" feature npc scan has. Deleting the creature file not enough in vista? Thanks again!
  • #1240
    There's a setting above the NPC lists to "Search for completed Achievement NPCs" that's off by default. If you turn that on, _NPCScan will start showing alerts for Vyragosa so you can kill her again.
  • #1246
    Awesome! I'll give that a shot. Thanks for the reply.
  • #1225
    My main has completed 'To All the Squirrels Who Cared for Me', but I still get alerts for all the critters. I have the alert for completed achievement mobs turned OFF. Its no big deal to me but I don't get alerts for the other achievement rares I've killed, like the ones in Northrend and Outland. I did try killing the critters after loving them (tough love, eh?).
  • #1239
    The "Search for completed Achievement NPCs" option only applies to mobs in the Bloody Rare and Frostbitten tabs in your "/scan" list. If you added critters to the first tab, they'll be tracked even if there's an unlisted achievement to find them. To stop their alerts, you must remove those critters from the Custom NPCs tab of _NPCScan's settings.
  • #1219
    Alright, here's my problem: I'm currently playing an 85 Hunter, looking for the Rares, like Karoma, and Sambas.

    I've done every single quest in the Twilight Highlands that I possibly can, even have the achievement for doing all of them.

    NPCScan CONSTANTLY caches BOTH Karoma, AND Sambas, WITHOUT giving me notifications of it. My Hunter never leaves TH, she's camped at Bloodgulch. I delete my cache each, and every time I log on, yet as soon as I log on, I get a message like:

    *09:21:18* _NPCScan: The following unit(s) are already cached. Consider removing them using “/npcscan”'s menu or resetting them by clearing your cache: “Sambas”.

    But it's never notified me that Sambas, or Karoma has been found. This is excruciatingly frustrating, as I'm seriously looking for these Rares, and adore using this addon.

    Is there possibly a bug with the Twilight Highlands phasing, that prevents NPCScan from properly detecting the two Rares, and is that what's causing me to keep finding them, without actually finding them?
  • #1224
    Do you ever see messages like this?
    "False alarm: Found tamable mob “Sambas” in [Zone] instead of [OtherZone] (ID [ZoneNumber]); Definitely a pet."

    That should be the only reason why they would get cached without setting off an alarm, but I haven't had any chance to test phasing zones like Twilight Highlands. The [Zone], [OtherZone], and [ZoneNumber] parts of that message would help me figure out what's happening though. In the meantime, I'll try tracking down any anomalies in that zone.
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