A Cy-Bug is like a virus - they don't know they're in a game. All they know is Eat, Kill, Multiply.Calhoun telling Felix what a Cy-Bug is.
The Cy-Bugs are the tertiary antagonists of the Disney movie Wreck-It Ralph. They are depicted to be giant robotic insects who serve the role of enemies on the first-person shooter Hero's Duty. They are like a virus by not stopping anywhere. The way they multiply is by laying eggs, and they hatch unless they're destroyed. They do not speak unless they swallow someone who does, and their heads turn into those of their own food.