The Cy-Bugs are the secondary antagonists of Disney's 2012 animated feature film, Wreck-It Ralph. They are a race of viral, robotic, bug-like creature viruses that serve as the generic enemies in the game Hero's Duty. Due to a programming error, Cy-Bugs are unable to tell the difference between the game and real life, meaning they are truly malevolent creatures. Their only instincts are to eat, kill, and multiply their swarm, while their greatest weakness are beacons of light. The soldiers of Hero's Duty remain in constant battle with the bugs, to prevent them from escaping the game, taking over the arcade, and destroying every game in their wake.