Sega Card
Hardware entity
A special game media for Master System I (card slot not present in SMS2) and SG-1000. Called "Sega Card" in Europe and US and "My Card" in Japan.
37
games
2platforms
Alternate names: マイカード, My Card
SG1K 1985
SMS 1985-10-27
SG1K 1986
SG1K 1983
SG1K 1985
SG1K 1985
SMS 1985-12-22
SG1K 1985
SG1K 1985
SG1K 1986
SG1K 1987
SMS 1985-12-15
Apparently these can be played on MegaDrive/Genesis. Not sure if the converter add-on - called Power Base Converter (US), Mega Adapter (JP) and Master System Converter (EU) - simply makes attaching the cards in the differently shaped card slot possible or if it actually does something more (e.g. emulation).
The first Sega Card video game was released in 1983.
Sega published all these games.