Bug Zappers is a game where giant alien bugs are trying to take over the earth. They are flying down to burrow into the ground so that they can lay eggs and create colonies to overcome the humans. Using their high-tech bug zapper helmets, two heroes must try to electrocute the giant insects as they fly down toward the earth.

You must control both characters at once to zap the bugs as they come down from the top of the screen. Only the yellow character can zap the yellow bugs, and only the purple character can zap the purple bugs. If a bug burrows into the ground, then the game is over.