The 2008 Hard Justice was a professional wrestling pay-per-view (PPV) event produced by the Total Nonstop Action Wrestling (TNA) promotion that took place on August 10, 2008 at the Sovereign Bank Arena in Trenton, New Jersey. It was the fourth event under the Hard Justice name and the eighth event in the 2008 TNA PPV schedule. Seven professional wrestling matches were featured on the event's card, three of which were for championships.

The main event was a Six Sides of Steel Weapons match for the TNA World Heavyweight Championship, in which the champion Samoa Joe defeated the challenger Booker T to retain the title. Another heavily promoted bout was a Last Man Standing match between Kurt Angle and A.J. Styles, which the latter won. The card also featured a match for the TNA World Tag Team Championship, which saw Beer Money, Inc. (James Storm and Robert Roode) defeat The Latin American Xchange (Hernandez and Homicide) to become the new champions. A New Jersey Street Fight was also held pitting the team of Christian Cage and Rhino against Team 3D (Brother Devon and Brother Ray). Cage and Rhino were the victors in the contest.

Hard Justice featured the start of a storyline between veteran wrestlers and younger wrestlers in TNA along with marking the beginning of Jeff Jarrett's return to active competition. 35,000 was the reported figure of purchasers for the event by The Wrestling Observer Newsletter. Hard Justice had a reported attendance between 2,300 and 3,500 people. Canadian Online Explorer writer John Pollock reviewed the show and felt it featured the "usual assortment of wacky finishes and outside interference" but that "all in all it was a solid show." Wade Keller and James Caldwell of the Pro Wrestling Torch Newsletter both reviewed the event, praising the Last Man Standing match saying it was a "superb" and "epic match."

In October 2017, with the launch of the Global Wrestling Network, the event became available to stream on demand.

The fourth installment under the Hard Justice name was announced in January 2008 with an August 10th date attached. In May, TNA hoped to host a PPV event in the Northeastern United States sometime before the end of the year. Hard Justice was the PPV under consideration. TNA issued a press release in late-June revealing that Hard Justice would be held at the Sovereign Bank Arena in Trenton, New Jersey. Tickets for the show went on-sale on June 27. TNA released a poster to promote the event featuring The Latin American Xchange (Hernandez and Homicide; LAX) and Samoa Joe; the poster also promoted a musical appearance by rap artists Filthee, Grandmaster Caz, and Ice-T. The official theme for the show was "AyAyAya" by Filthee.

Hard Justice featured seven professional wrestling matches that involved different wrestlers from pre-existing scripted feuds and storylines. Wrestlers portrayed villains, heroes, or less distinguishable characters in the scripted events that built tension and culminated in a wrestling match or series of matches.

The main event at Hard Justice was a Six Sides of Steel Weapons match for the TNA World Heavyweight Championship between the champion Samoa Joe and the challenger Booker T. Joe and Booker T previously fought at TNA's Slammiversary PPV event on June 8 in a King of the Mountain match for the title, which Joe won to remain champion. The duo also fought at TNA's previous PPV event Victory Road on July 13, which ended in a no contest after interference from Sting allowed Booker T to gain an unofficial pinfall counted by his legitimate wife Sharmell instead of an official referee. On the July 17 episode of TNA's television program TNA Impact!, Booker T proclaimed that he was the new TNA World Heavyweight Champion before Management Director Jim Cornette announced that Booker T did not win the match and that Joe was still the TNA World Heavyweight Champion, despite Booker T having taken possession of the title belt. Cornette then scheduled a rematch between the two for the title at Hard Justice; Joe did not retrieve physical possession of the title belt after this, instead chose to reclaim the physical belt after he beat Booker T at the event. On the July 24 episode of Impact!, Joe and Booker T made the contest a Six Sides of Steel Weapons match.

The predominant storyline heading into the event was the rivalry between A.J. Styles and Kurt Angle, both members of The Angle Alliance. On the February 14 episode of Impact!, TNA held the scripted wedding of Angle's real-life wife Karen Angle and Styles despite Angle and Karen still being married on-screen. Afterwards, Karen and Angle separated in the storyline on the March 13 episode of Impact!. TNA continued to build the situation with Angle attempting to reconcile with Karen on the May 15 episode of Impact!; TNA began to phase out the marriage between Styles and Karen also. Karen refused Angle's request on the May 22 episode of Impact!, leading to Angle turning on and assaulting Styles later in the episode due to his jealousy of the affection Karen showed for Styles. This led to a match between the two at Slammiversary which Styles won after a distraction by Karen. The two faced in a Lumberjack match on the June 12 episode of Impact!, which Angle won before it ended in a brawl between Styles, Angle, Tomko, Christian Cage, Rhino, Abyss, and Team 3D (Brother Devon and Brother Ray). Afterwards, Team 3D and the team of Cage and Rhino became involved in the feud with Team 3D joining Angle, while Cage and Rhino sided with Styles. The two teams then fought in a Full Metal Mayhem at Victory Road, which the team of Angle and Team 3D won. The teams fought again on the July 24 episode of Impact!, this time in a Six Man Tag Team Elimination Tables match, which Angle and Team 3D also won. On the July 31 episode of Impact!, while Styles stood in a ring surrounded by a steel cage, Angle attacked Styles from behind and slammed him back-first into the mat, rendering him unconscious. As a result of this action, Styles challenged Angle to a Last Man Standing match at Hard Justice; Angle accepted the challenge.