Thunder Force[a] is a series of shooter video games developed by the Japanese software company Technosoft and published by Sega.

The series' first game, Thunder Force, appeared in 1983 on a variety of Japanese computers, such as the X1, PC-8801 mkII, and FM-7.

She later left Technosoft and founded Arsys Software in 1985, where herself and Osamu Nagano worked on notable titles such as Star Cruiser.

[1] In 1984, Technosoft released a level editor, or game creation system, titled Thunder Force Construction, created by Yoshimura for the FM-7 computer.

[2] In September 2016, Sega announced at the Tokyo Game Show that they've acquired the rights to the Thunder Force franchise and all other Technosoft intellectual properties.