Insector X is a side-scrolling shooter for the Nintendo Entertainment System where players assume the role of an insect warrior named Kai. Tasked with liberating the insect realm from the oppressive rule of the queen, players navigate through various levels while battling cyborg insects. Gameplay features an upgradable main weapon and a secondary weapon system that randomly selects abilities.
The player controls an insect-sized warrior named "Kai" who takes on a vast army of cyborg insects to free the insect world from the dark ruler queen. The game uses two buttons: one for an upgradable main shot, and another for a seemingly random selection of secondary weapons.