Project Justice

Project Justice's fighting system is lifted from the original Rival Schools, with some notable changes. The game continues to be a team fighter, but has teams of three characters instead of two. This allows another Team-Up attack to be used in a fight, but also adds a new type of attack, the Party-Up, initiated by pressing any three attack buttons. The Party-Up is a three-person attack that varies based on what school the character initiating the attack is from.

The additional partner also allows players to cancel an opponent's Team-Up Special by inputting a Team-Up command of their own. This initiates a short fighting sequence between one character from each team. If the person initiating the sequence gets the first successful hit in during the sequence before time runs out, the Team-Up they are caught in will be canceled, and the game switches back to the main fight; if the opposing player gets the first hit or time runs out, the Team-Up continues as usual.

One year has passed since the events of Rival Schools: United By Fate, and things have gone back to normal in Aoharu City. Batsu Ichimonji, Hinata Wakaba, Kyosuke Kagami, and the rest of the fighters had resumed their normal school lives and all of them have since enjoyed the calm peace that came after their last adventure, but the peace itself doesn't last for long as the fighters would soon find themselves getting involved in a new battle.

Kurow Kirishima: a cold-hearted and ruthless ninja assassin from a mysterious group known only as the "Reverse Society" has his sight set on the Imawano family and plans to eliminate them and their allies so that he can prepare for the advancement of his own ambition to rule Japan. To this end, he attacks Raizo Imawano: the principal of Justice High, father to Batsu and uncle of both Kyosuke Kagami and Hyo Imawano so that he can easily put him out of commission and not have any interference come from him. Secondly, he sends both his older sister Yurika Kirishima and his loyal subordinate Momo Karuizawa into the ranks of the fighters so that the two of them can cause tension and distrust to occur between the friends. His third plot involves brainwashing Gedo gang leader Daigo Kazama so that he can order him into forcing his gang to attack various schools in order to cause even more tension to occur. Lastly, Kurow himself plans to destroy Batsu's reputation by disguising himself as Batsu's doppelganger (named Vatsu) so that he can attack the fighters and make them believe that Batsu is behind it.

It was released in Japan as an arcade game in December 2000 and ported to the Dreamcast, which shares the Naomi architecture, at the same time. The U.S. version was originally slated for a February 2001 release, before it was further delayed to 16 May.

The arcade version was re-released in 2025 as part of Capcom Fighting Collection 2.

The Dreamcast version received "favorable" reviews according to the review aggregation website Metacritic. Many video game magazines gave the game positive reviews while it was still in development. Chester "Chet" Barber of NextGen said of the game in an early review, "Unless you're hard-up for a new fighter, you may want to rent it before making a purchase." Michael "Major Mike" Weigand of GamePro said in an early review, "Fighting fans looking for their next challenge should spend some time with Preject Justice." In Japan, Famitsu gave it a score of 33 out of 40.

Also in Japan, Game Machine listed the arcade version as the most successful dedicated arcade game of January 2001.