Knockout Kings 2000 for the Nintendo 64 is a boxing simulation game developed by Black Ops Entertainment and published by EA Sports. Released in 1999, it features a roster of legendary fighters like Muhammad Ali and Sugar Ray Leonard, alongside contemporary boxers of the time. Players can step into the ring in various game modes, including Career Mode, Exhibition, and Tournament. Its genre is sports, specifically focusing on boxing. The game offers players a mix of realistic movements and arcade-style action with intuitive controls, making for an engaging sports experience on the N64 console.