AI weapon (Peace Walker Project)

AI Weapons were mechanical vehicles that, as the name implies, were completely automated. There were 4 AI Weapons: Pupa, Cocoon, Chrysalis, and Basilisk, reflecting hover, Tank, Flight, and Walking, respectively. Pupa, Cocoon and Chrysalis were prototypes to Basilisk.

All of the AI weapons contain a Reptile Pod; an AI module that allows the AI Weapon to follow basic commands. Basilisk, however, was different in the sense that it contained an extra AI called the Mammal Pod that was used to calculate the chances of a Nuclear Attack, and based on the data (true or false), it launches what it believes to be a retalitory Nuclear Weapon over to the nuclear threat.

Big Boss and the Militaires Sans Frontieres encountered each of these devices when trying to investigate an armed force belonging to the CIA that was sending Nukes into Costa Rica.

For unknown reasons, whenever Big Boss or one of his comrades managed to rip out certain key components to the AI pod in Pupa, Cocoon, and Chrysalis, the AI pod, when detached, launches itself into the sky in a similar fashion to a Rocket.