Twenty-One began to release products in 2008 under the Technosoft brand, and sold the entirety of its video game library to Sega in 2016.

The Technosoft name continues to be in use in the present day as the name for Twenty-One's research and development division, and as a brand name for various products such as soundtrack albums.

Some staff members left Technosoft to start the game development companies Arsys Software in 1985 (founded by Kotori Yoshimura, creator of Thunder Force and Plazma Line), CAProduction in 1993, and Ganbarion in 1999.

These registrations revised the copyright of Technosoft intellectual properties from Kazue Matsuoka to Sega Games Co, Ltd thus completing the acquisition.

The games are known by fans of the genre for their hardcore appeal, pleasing graphics, and generally well composed synthesizer-based chiptune music soundtracks.

[10] Yoshimura later left the company in 1985 to start the development studio Arsys Software along with fellow Technosoft member Osamu Nagano.

[12] Herzog (German: "Duke") is a strategy video game released by Technosoft in Japan for the MSX and NEC PC-88 computers in 1988.

The series' best known entry is the Sega Mega Drive (Genesis) title Herzog Zwei (1989), which is sometimes regarded as the world's first real time strategy game.

Although released two years after Nether Earth, it was the first game with a feature set that falls under the contemporary definition of the real-time strategy genre, predating the genre-popularizing Dune II.