National Havoc Robot League

National Havoc Robot League The National Havoc Robot League (NHRL), formerly known as the Norwalk Havoc Robot League, is a robot combat organization headquartered in Norwalk, Connecticut. Founded in 2018 by entrepreneur Austin McChord, NHRL hosts a series of open-registration tournaments each year in which hobbyist and professional builders compete in one-on-one cage matches across three weight classes. The organization is a subsidiary of Havoc Robotics Inc., and Kelly Biderman has served as its chief executive officer since 2021.

Since its founding, NHRL has grown from a regional competition to what it describes as the world's largest robot fighting tournament, drawing thousands of competitors from nearly every continent and accumulating a reported billion organic social media views annually as of 2025. In 2026, the organization launched the NHRL Pro Tour, billed as the world's first professional robot fighting league.