is a music video game series produced by Konami. It is a rhythm game where the player uses a controller to simulate the playing of an electric guitar. The game consists of music predominantly from the rock music, rock and roll and J-pop genres. It is considered one of the most influential video games of all time, for having laid the foundations for popular guitar-based rhythm games, such as the Guitar Hero series. Working Designs attempted to bring Guitar Freaks PlayStation 2 games in the U.S., but patent problems with the guitar controller prevented the project from moving forward.