Satellite 7 is a fun little shooter released for the Mark III in Japan on a card. It never found its way to Europe and USA, which is quite odd as it has an English title, English text and would be just as playable for non-Japanese gamers. It also has that classic "feeling" I get from playing these early Japanese Sega-games, even though I didn't play it as a kid. If I had I'm sure I would have liked it, even though it's not a long adventure type of game - it's just a fun little top-down shooter, that even has a co-op mode, which was quite rare back then. The music is also quite charming, and I've found myself to be playing this game a lot lately, trying to beat my own personal record (58 000 points at the moment). It's a fun challenge!
Invincibility
PAUSE the game and press: BUTTON1 three times, and then BUTTON2 seven times to become invincible.