Explore a massive concrete skyscraper named "The Oldest House" with your trusty Service Weapon in hand, a gun that changes shape in a supernatural way. This vast environment, which constantly changes form, is much larger on the inside than it appears from the outside and is filled with intricate secrets.

Secrets are everywhere in this unpredictable environment, collaborate with other Bureau agents to decode strange puzzles and shed light on the bizarre experiments taking place in the vast New York building.