This example will show how to make NPCs attack bullseyes, how to use relationships to make NPCs friendly or hostile, hinges to "hang" objects from a specific point or angle.
In this example a citizen stands under a platform held up by four strong pillars.
The zombies will attack the wooden pillars so that the platform "falls" on the citizen wich kills him..
The platform is hung up by a phys_hinge in the other end, which causes the platform not to fall - but to rotate when the pillars are broken.
The platform itself is a func_physbox.
Don't mind the zombies, they won't hurt you.
Using ai_relationship between both the zombies and you prevents them from bothering you
Press the button to make the zombies mad at the pillars!
Thanks!