Overunity refers to a hypothetical situation where a device produces more energy than it consumes, effectively creating energy from nothing. This concept challenges the fundamental laws of physics, particularly the First Law of Thermodynamics, which states that energy cannot be created or destroyed. Many inventors and researchers have claimed to develop overunity devices, but none have been scientifically validated or accepted by the mainstream scientific community. The pursuit of overunity often leads to discussions about free energy and alternative energy sources, but it remains a controversial and largely debunked idea in physics.