Thunderbolt II

Thunderbolt II, also referred to as Lei Dian Chuan Shuo II or simply Lei Dian II, is an unlicensed vertical scrolling shoot-'em-up game released for the Sega Mega Drive in 1995. There is no evidence of a Thunderbolt I ever existing; the title likely draws inspiration from Raiden II, a 1993 arcade shooter by Seibu Kaihatsu, which served as a sequel to the original Raiden.