From the Zanac NES manual:
One day, someone opened the icon improperly. The system started operation and started attacking them. Then, they opened it properly. The icon ordered the system to suspend the attack. The system however ignored this order and became a slaughter device. The human beings who opened the icon fell into crisis. The attack from the system overwhelmed the offensive power of the human beings. When they were about to perish, there was one hope - the system is basically a strategic machine and is equipped for fighting against a multitude. If a single object confronts the system by itself, the system might not be able to cope with it effectively.
