Born out of the country's thriving bootleg industry, Zemina (the name can be read as "It's fun!" in Korean) started distributing copies of Japanese MSX games, and even went on to release several under official license after the software protection law was enacted, including Panasoft's Ashguine, Falcom's Drasle Family and Konami's Nemesis 3 (as Salamander 2), all the while still selling pirate copies of the Japanese pre-1987 games. Like many companies at that time, their endeavors weren't limited to software products, but they also manufactured a number of accessories. Their catalogue included cartridge port divider modules, a MSX music cartridge, RAM expansions and a Famicom-to-MSX converter.

At the same time, Zemina also became one of the first companies to also steadily release domestically programmed games. Most of these were still ports or reinterpretation of known games, like Super Mario Bros. or Tetris, but in later years their games became more and more independent of their archetypes, even though they never quite managed to emancipate themselves completely from other companies' materials. The games were developed by at least three different teams: Lead developer Kim Eulsuk and Koo Eunjoong were responsible for Brother Adventure and the Super Boy series, Lee Kyuhwan and Lee Sanghun did Double Dragon and The Three Dragon Story. Finally, team MbitM under Jeong Chanyong created the Bubble Bobble variants and Micro Xevious. Several games do not contain any credits at all.

In July 1988, Zemina was incorporated as a stock company. President Jeong Hyeonsu passed away within the next few years, whereafter the Zemina brand and employees were taken over by an enterprise called Saehan Sangsa.

There have been and still are literally dozens of businesses that go by the name Saehan Sangsa in Korea, so it is quite impossible to secure any more information about it. The company's CEO apparently was one Bang Junseok, although the copyright for all later Zemina games was registered in the name of one Kim Yeongjeong.

In July 1990, Saehan Sangsa first exported a number of games, ram slot expansions and music add-ons in value of reportedly US$70,000 total to a Netherlands-based distributor called Centrum. Later the MSX Club Gouda also imported Korean cartridges, mostly by Zemina. The games were sold in humble quantities in Europe, though.

While Zemina was an MSX developer first and foremost, most of the titles were later converted to the Samsung Gam*Boy / Master System. Early in 1992, the company published its first game made specifically for Famicom compatibles with Magic Kid Googoo, but shortly thereafter, most of Zemina's programmers left the company to form Open. It appears like Saehan Sangsa broke apart at that time, although the Zemina name lived on for a while in some of the former store branches. The final game with the Zemina label, the Master System exclusive Super Boy 4, was independently released by the Zemina Gametown store at the end of 1992. It is not known whether it was a belated release of a leftover completed earlier or an outsourced job.