Huge Hidden Secret In Outlast 2!!! Unlock a Gun???

Havent seen this secret anywhere else, its pretty massive it may shock anyone watching so this video is not for the feint of heart so be warned, i love just messing around in games and after i beat the outlast 2 demo i was just goofing off around the map and i noticed these noises that play when you stand in specific spots on the map so check it out and i hope you enjoy