ED-E is a floating eyebot companion in the 2010 role-playing game Fallout: New Vegas, developed by Obsidian Entertainment. The robot can accompany the player across the Mojave Wasteland and alert them when hostile characters are nearby. Its distinctive combat cue became memorable because it can interrupt quiet exploration before the player has identified the danger. Fans continue using the brief musical sting in Fallout videos, gameplay compilations, and humorous edits that recreate the feeling of an unseen encounter suddenly beginning.