Fight Night Round 4 is a video game developed by . It is the sequel to , released in 2006. It was released in 2009 for the , , and . The game's featured boxers are and . It contains 48 licensed boxers as well as several new modes, such as Legacy mode.
Fight Night Round 4 received "favorable" reviews on both platforms according to video game . In Japan, gave it a score of three sevens and one five for a total of 26 out of 40.
's Justin Calvert praised the game's fast action and its online play. 's David Ellis commented that the physics engine improved the gameplay, and made punches feel more realistic. Game Revolution said "Its incredibly accurate physics system doesn’t just set a new bar for boxing games, but for all games across all genres." 's Will Tuttle noted the game's "stunning visuals", and praised the online gameplay. 's Andrew Hayward thought that the gameplay flowed better as a result of the , which ran at sixty frames per second. 's Nate Ahearn felt that the game delivered "the best pure boxing ever seen in a video game." Destructoid said "It doesn’t matter if you care about boxing; this superb game is worth a look from everybody; the game itself is a blast to play, and that’s what stands out." Eurogamer described it as "An intense, heart-rattling experience that gets more rewarding the more time you invest in learning the nuances. With incredible attention to detail, technical achievements are more than mere eye candy and a deeper, more rewarding fighting system than ever before, it's an essential purchase for boxing fans and fighting game aficionados."
Criticisms were mostly focused towards the single player aspects of the game. IGN's Nate Ahearn commented that the minigames found in the legacy mode were too difficult, a sentiment echoed by GameSpy and GameSpot. 's criticized the legacy mode for being wrapped in "layers of unnecessary menus". Official Xbox Magazine said "Despite the uphill difficulty curve, repetitive commentary, and long loading times, Round 4 is a force that topples its mind-blowing predecessor in every category." GamesTM said it was "A calculated and intelligent game that favours forethought and tactics over button mashing and impatience."
The game topped the UK sales charts for several weeks. Total sales exceeded 1 million units.