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Friendly NPC's

I HIGHLY advise against using other addons that interfere with npc relationships, there will be bugs more than likely.

Usually friendly npc addons in gmod tend to not be very convenient, they either make an new entire npc that's just a friendly version (which usually ends up still attacking your allies), or are a tool that's not very good if you want to quickly spawn friendlies.

With this in mind, I borrowed Rubat's "Make Friendly" code for the Extended Properties addon and with that, you can now quickly spawn Allied NPC's of any faction that won't discriminate against each other.

I also took the time to add some options, so now if you want, you can have a 1000 zombie acting as a meatshield for you, or a combine with very good aim helping you out in combat.

Options can be found on Utilities > Witch83

Known Bugs/Limitations:
-Poison Headcrabs launched from Poison Zombies are never made friendly.
-Allies will sometimes forget who's their friend and shoot each other for a brief moment.
-Spawning an ally, toggling the mod off to spawn a hostile of the same faction for them to fight, then toggling the mod back on to spawn another ally of the same faction, will sometimes make them fight each other (and every friendly spawned from then on in the same session will fight each other).
-Hostile NPC's can't target friendly npc's of the same faction if the friendly npc is spawned first.

These last 2 bugs stem from npc relationships acting weird when modified in real time, there is nothing I can really do about this.

Credits:
Witch83 - Author, made the options for the mod
Rubat - "Make Friendly" code from Extended Properties