I look forwards to a day when someone makes a good and fun AI for a shooter or something.
Basic gists would include: -if you shoot/snipe them from cover, the survivors know the general direction you shot from, but don't instantly see you unless you are right next to them. Their actions may vary to getting behind a tree or other cover, attempting to see where you are, etc. -Even if you jump out of the bushes, they don't instantly lock onto you. They take a second or two to after becoming aware of your existence before they start aiming at you (and those who are looking the wrong way at the time i.e. have their head turned to the side to scan for things in that direction will take a bit longer still). -Unless they recognize you and presently are looking at you, they only act on knowledge of either where you last were and the direction you were moving at that time, or a broad general area. This also applies to other things, including their allies. -They have a "fear" stat that builds based on various things (especially being hit repeatedly by something and not knowing where it is). As it gets higher, the AI units start behaving more erratically and stupidly. Some may eventually just panic empty their clips in a spray towards where they think you might be, some may get really jumpy and if really panicked shoot anything that surprises them (including the chance of accidentally opening fire if an ally suddenly jumps out in front of them). At max level they may just turn and bolt away from wherever they think you are at the time. -If left alone following the first attack, they will after a little prepare and commence a search operation of some sort to try and find you (the poor fools, as this likely splits them up). .
maybe it's not perfectly like this, but Far Cry had gameplay similar to that (I have yet to play anything beyond Far Cry 1 though I do own 3 and want to play it but haven't gotten around to it)
