Fight Night Round 4 is a boxing simulation video game released in 2009 for the PlayStation 3. Developed by EA Canada and published by Electronic Arts, the game is the fourth installment in the Fight Night series. The game features several new game modes, improved graphics and animations, and a new physics-based animation system for realistic punches and knockouts. Players can choose from a roster of real-world boxers, including legendary fighters such as Muhammad Ali and Mike Tyson, as well as customize their own boxer with a variety of clothing, tattoos, and hairstyles.

Fight Night Round 4 offers several game modes, including a career mode, an online mode, and an exhibition mode. In the career mode, players create their own boxer and train them to rise through the ranks of the professional boxing world. In the online mode, players can compete against other players from around the world in ranked and unranked matches. The exhibition mode allows players to jump into a quick match against either the computer or a friend.

Fight Night Round 4 features improved visuals and animations, including realistic facial expressions and body movements. The game also features a new physics-based animation system, which allows for more realistic punches and knockouts. The game also features a new control system, which allows players to use traditional button combinations or the new analog stick-based control system.

Fight Night Round 4 is available on disc and as a download from various online stores, including romsbase.com. The game can also be played with compatible ROMs and games. The game is rated T for Teen by the ESRB and is suitable for ages 13 and up.