In the addon, there is one glitch. The glitch is that when I spawn and setup NPC Combines in a fortress, and a noded_graphed world. And after setting them up. All them will patrol around and most of the time will turn into alert mode and try to chase me even though I didn't even shoot or run near them. I also checked if Addons were conflicting with this addon but no. Developer, please fix. This would a perfect addon if NPC's don't run after you and shoot you and then when they get close to you they enter alert mode, step back and keep shooting you, horde of enemies coming after you even if you do a sucessful stealth job.