[OLD] Cultic Demo ~ Very Hard Walkthrough (All Kills + All Secrets) 

This is Cultic, a Retro First-Person Shooter developed by Jason "Jasozz" Smith and published by 3D Realms, who you may know as the company behind Duke Nukem (1996) and Shadow Warrior (1997).
The version of the game played in this video is outdated. Check out the current version at store.steampowered.com/app/16...