This is an AI system that is intended to simulate real players roaming the map, scavenging, looting and engaging in combat. Unlike other AI systems Sarge AI designates two factions as friendly and only one faction as hostile. This approach provides a simulated pvp/pve environment that changes depending on how players react to the AI.
AI hostility is based on player rating and AI will change their behaviour depending on a players rating level. Above the threshold the friendly AI will not attack players. Below the threshold friendly AI will consider the player hostile and fire on sight. Bandit AI will always be hostile to players regardless of player rating.
Almost every setting you can think of is available to be customized to each server owners liking. This includes weapons, uniforms, vests, headgear, cars, helicopters and much more. Server owners even have the option of creating their own map markers for static AI to patrol, fortify, ambush and other tactical approaches.
Survivors
Military
Bandits
This description is brief but to the point. Although it may not be listed you will find these NPCs are capable of suprising things.