Armory, Blender, Game has released another Module for the Armory game engine. This one covers tracking one object with another, like a turret tracking a player or a security camera. The module includes node trees for the basic tracking action and different ways to start and end the action. This module was created with Blender 2.8 and Armory .6 and requires the Logic Pack download for Armory, so there may be issues with older versions of either software. The module itself is a "pay what you want" file on GumRoad.
There are two videos covering the pack available on the Armory, Blender, Game YouTube channel.