HALOS is an unknown entity that Dr. Horn worked on. It is the subject of the Pizza Code Mystery as pizzas were used to (presumably) transport materials to the HALOS project. The problem is, no one exactly knows what HALOS is. Considering numerous references around the ARG, most believe it is some sort of AI, but it could be something else entirely. As such, there is several theories around to what it is and what it's purpose is.
HALOS Theories Edit
These theories are:
1. Some form of AI
2. Given the metal that was transferred by pizzas, the project may be nuclear in nature.