Virtual- On is a series of video games, created by Sega's AM3 (Amusement R&D Dept.#3) later renamed Hitmaker, and first published for the arcade in February 1995. In Japan it is known as Dennou Senki Virtual On. The gameplay consists of a fast, action oriented, gameplay, where quick reflexes are of the utmost importance. The game has seen 4 iterations, and has been ported to several consoles.
Other merchandise has also been released for the general public such as Plastic Models, Original Soundtracks, Trading Figures and even Audio Drama CDs. (Wikipedia)