gm_construct_13_beta is a map from the popular steam game Garry’s Mod it’s mostly the same as gm_construct with slight differences and weird occurrences, the map was created by XALALAU, it uses Garry’s Mod lua for its many events, triggers, occurrences, and hauntings, with a variety of different entities collectively making its horror experience unique, there is many ways to get and discover new things in this map using other addons, people can discover these using the oracle in the vents.