Zanac

ONE AGAINST THE SYSTEM

From a mere speck, it grew to become one of the most powerful forces in the universe. It is "The System." Created by an organic intelligence body long ago perished, a malfunction has turned this once benevolent non-life form into a wholesale slaughter machine. Mankind's only hope is AFX-6502 ZANAC in a one-on-one fight to the death confrontation. Now, it's just you against the system, and to the victor goes the remains of the human race.

GAME PLAY: You are fighter model ZANAC, build by 256 Riot Fleet as man's last hope against total annihilation. On board are eight special weapons to help you blast your way through twelve screens of enemy creatures and destroy the systems home base. But strike with a single blow. The more weapons you waste, the stronger the system becomes. Want a higher level of game play? Zanac's artificial intelligence program can intensify the action based upon your level of skill. The better you are, the more powerful "The System."

Source:

The Official Nintendo Player's Guide (1987) - NES