Year Zero:
The Year Zero ARG (Alternate Reality Game) was a massive multimedia project created by Nine Inch Nails in 2007 to promote their album "Year Zero." The game took place in a dystopian future where the United States had become a police state ruled by a mysterious entity. The game was spread across multiple platforms, including websites, phone numbers, and even live events. Players would solve puzzles to uncover the story and reveal hidden content related to the album. The game's storyline tackled themes such as government surveillance, media manipulation, and the dangers of technology.
References
Lots of Dahlia world names are references to the band NIN. Their songs are also played quite often in the background of certain worlds.
References
Shutdown:
Shutdown plays multiple NIN songs on loop no matter the timer. First it plays (Insert) and "I'm Not From This World"