Thunderbolt II - known in Taiwan as Léidiàn Chuánshuō II (雷電傳說 II) with either the subtitle Thunderbolt Fighting Plane (Famicom) or Thunderbolt II (Mega Drive), is a vertical shoot-'em-up developed by Gamtec.
The Famicom version has a title date of 1993, but some sources say it didn't actually release until 1995. The Mega Drive version was released in 1995. Piko Interactive bought the rights to the game and released it as a post-market cartridge for the Genesis in the west in 2019.
It is unknown if there is a previous game titled Thunderbolt/Thunderbolt I. Based on the Famicom version's subtitle, the name may refer to the player's plane itself. The Chinese title roughly translates to "Raiden Legend II" and may be an attempt to capitalize on Seibu Kaihatu's Raiden series.