Tracking via sound

[kickinit233]

I am currently trying to make a fan game of the film the Descent in which the characters are stuck in a  cave system filled with creatures that can only track something by sound. So what I am wondering is if someone could make a script or tutorial that makes it so events only notice the character when they are moving (or not exactly notice in this case but they would go investigate), or moving over noisy terrain which would tip them off immediately, using an item, etc. I.E they will go towards anything that creates noise, kind of like the alien in Aliens isolation.

 

[Valtrise]

Maybe you can set up a group of events on tiles you consider noisy and set it turn on a switch (track noise). Then for the monster event have it set for a condition to approach player when the track noise switch is on. when the player leaves tiles that don't make noise you can event those tiles to turn off the track noise switch. There also may be a event by region ID script to save you from having a million events maybe something like  http://himeworks.com/2013/04/custom-event-triggers/   by Hime.