How do Fallout 1 and 2 decide which enemies enter combat with you?

45hWa1k3r

45hWa1k3r

First time out of the vault
The question might sound confusing, so let me clarify.

When you enter combat, you don't aggro all enemies on the map, right? Only those in the general vicinity.

Is this due to hard coding, in which groups of enemies are programmed to enter combat as a group of provoked? Or is there an algorithm that determined which enemies are aggroed, based on factors like distance or line of sight?
 
It is actually possible to enter sneak mode, and attack an NPC (in public) unseen, if you eliminate them during your first turn, before anyone else reacts.
It's considered a stealth kill.

I do not know this for fact [BIG IIRC], but there might be hostility per faction as well. In the Regulator fight, the town and the regulator gang will go hostile if your PC attacks the regulators first. In New Reno, fights in the streets can have disinterested bystanders amidst the combatants, that is until one of the bystanders gets harmed by intent or accident; resulting in their faction going hostile~~but not necessarily towards the PC if it wasn't the PC who attacked them.
 
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Gizmojunk said:
It is actually possible to enter sneak mode, and attack an NPC (in public) unseen, if you eliminate them during your first turn, before anyone else reacts.
It's considered a stealth kill.

I do not know this for fact [BIG IIRC], but there might be hostility per faction as well. In the Regulator fight, the town and the regulator gang will go hostile if your PC attacks the regulators first. In New Reno, fights in the streets can have disinterested bystanders amidst the combatants, that is until one of the bystanders gets harmed by intent or accident; resulting in their faction going hostile~~but not necessarily towards the PC if it wasn't the PC who attacked them.
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Thank you, but I knew about Stealth mode and Stealth Kills; what I'm unsure of is what happens when you don't hide: assuming all NPCs on the map are the same kind of monster, if I shoot at one in a group, and there are other groups on the map, how does the game decide which monsters enter combat with me and which don't?

I know NPCs have a line of sight algorithm for detecting the player; but is that the only factor?
 
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