It is free of charge, and includes a new training gym, new gameplay sliders, new equipment and an alternate version of Sugar Ray Leonard.

Additional trunks, gloves and shorts were released along with face button control support in a free update at the end of August.

In early December, a new pack including Bernard Hopkins, Evander Holyfield, Sonny Liston and two new modes (Old School Rules & Ring Rivalries) was released for the PlayStation 3 and Xbox 360.

[8] The game space is called "Club Fight Night" and features a Club-DJ mini-game with rewards, two video screens and seating for avatars.

On November 25, 2009, two producers of Fight Night Round 4, Mike Mahar and Brian Hayes, were in the space for a live chat with the Home community.

[9] Physics based controls, Career mode is redesigned and replaced with legacy mode, players Can use photo game face to more easily put the player in the game, boxers can only block high and low, More focus on counter punching, User controlled cutman is removed and replaced with a point system, and Downloadable characters.

New boxers to the franchise allowed recreations of fights such as Ricky Hatton vs. Paulie Malignaggi, Marvin Hagler vs. Thomas Hearns and Fernando Montiel vs. Nonito Donaire.

IGN's Nate Ahearn commented that the minigames found in the legacy mode were too difficult, a sentiment echoed by GameSpy and GameSpot.

[21] 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."