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The Cyberdisc is a small UFO-like robotic combat drone used during the First Alien War. It moves by hovering, making a stereotypical UFO hum as it flies. Its primary weapon is a plasma beam that can fire in any direction. When a Cyberdisc sustains critical damage, it explodes violently. However, stun weapons will not cause it to explode. Cyberdiscs are often found on terror missions lead by Sectoids.