arcade game of 1985, and the year's highest-grossing game in route/street locations. In 1995, Flux magazine ranked the game 91st on their "Top 100 Video Games". Home computers On home computers in the United States, Data East's Karate Champ floppy disk received a "Gold Award" from the Software Publishers Association (SPA) in July 1987 for sales above 100,000 units, then a "Platinum Award" for over 250,000 sales in February 1988, and then a "Diamond Award" for sales above 500,000 units in January 1989. It was the first game to receive the "Diamond Award" from the SPA, and it was one of the top two best-selling computer games in the United States (along with Where in the World Is Carmen Sandiego?) up until June 1989. Rick Teverbaugh reviewed the home computer version for Computer Gaming World, and stated that "my only complaint is that some of the in-match options are counters for a move of your opponent, but there often isn't any time for those reactions". Ahoy! opined that the Commodore 64 version "isn't quite as electrifying as the arcade version, but it's an entertaining action-strategy test". The magazine concluded that "the learning curve is steep, but ... when the joysticks are in the hands of two practiced gamers, it is one of the most exciting games to hit the computer screen in a long time". Legacy Karate Champ inspired numerous martial arts games. Its release was followed by a wave of karate and kung fu games attempting to capitalize on its success. It is credited with establishing and popularizing the one-on-one fighting game genre, for which IGN listed it as one of the top ten most influential games of all time. The Player vs Player edition of Karate Champ was also the first fighting game to allow two players to fight each other. Karate Champ influenced titles such as Konami's Yie Ar Kung Fu (1985), Beam Software's The Way of the Exploding Fist (1985), and other fighting games. John Tobias cited Karate Champ as the primary inspiration for the gameplay of Mortal Kombat (1992). In 1985, Data East began taking legal action against counterfeit arcade manufacturers, both in Japan and internationally. Data East later brought suit against Epyx alleging copyright infringement for its 1986 game World Karate Championship. The case, Data East USA, Inc. v. Epyx, Inc., went to the ninth circuit court, where it was held that the typical