Zemina Co.

Description
Zemina was a South Korean games developer which was closely tied to the Zemmix console, a console version of the MSX computer that was only released in Korea. Since Zemmix was compatible with the MSX, their games sometimes managed to spread all the way to Europe through channels of dubious legality. Apart from the MSX and Zemmix, Zemina also made games for SEGA's Master System (Known as Samsung Gam*boy in Korea), which was easily done since the two systems shared the same basic platform.
Since South Korea had bad relations with Japan due to the experiences of occupation, Japanese companies were not allowed to operate in Korea. Therefore, SEGA had to go through Samsung as a partner, and Nintendo was handled by Daewoo. Due to this, copying or plagiarising Japanese goods was not illegal, or at least not something which occupied the authorities. For this reason, many of Zemina's games are unauthorized conversion of Japanese games.