Original Post — Direct link
over 1 year ago - /u/JagexDaze - Direct link

Oooh, now you're making life difficult!

So we've done some investigation and it turns out - it's not a bug and it's always been this way.

Are you ready for an adventure?

Having looked at the vyrelords, it turns out they are quite a unique NPC in that they have a field of view of 180 degrees. This means they can only see players that are front of them (from right to left of the way they're facing). That NPC that you noticed that wasn't aggressive was because it was facing away from you; as soon as it turned you can see it then becomes aggressive.

To clarify further that this hasn't changed, we managed to find a video from 5 years ago that shows exactly this: https://www.youtube.com/watch?v=FfmsG6sMsac&t=206s

They even comment how it doesn't have aggro and you need to use Corruption and Dragon Breath!

Hope that explains it! You're really testing us now, and unveiling some real fascinating facts about some RuneScape mobs.

over 1 year ago - /u/JagexDaze - Direct link

Originally posted by MaxedPainRS

How it's been for years is the following: there is NPC's around that shout "Human!" if you are not disguised, this aggros vyres onto you faster than waiting for them to turn around and spot you manually. In the video around 0:17 one of the NPC's shouting in the NE walks away and there is no other around to spot him and force aggro on him.

Normally there should be another static NPC to the SW (looking at the compass) which does a fairly good job in aggroing, but walking under these npc's make them move which happens a lot due to players doing Clue scans in the area.

Please correct me if I am wrong, or feel free to look into the NPC code in your spare time, but this is how I have seen it over 5 years ago where a group of people used to stand under/lure NPC's to specific tiles to get better xp/h (because of the better aggro).

TL;DR I really don't see an issue in this Twitch clip other than expected behaviour.

Absolutely correct - if the 'scouts' see you and shout human they do a hunt around themselves to find a vyrelord and tell it to attack you. As you mention at 17s, there are no NPCs close enough to hear the shout and therefore no extra vyrelords begin to attack.