Zillion

Zillion is an action-adventure game developed and published by SEGA for the Master System. Subtitled "The Mega Cartridge", it uses a 2 megabit cartridge, a significant capacity for the time. The gameplay combines exploration, puzzle-solving, and laser gun combat. Inspired by the eponymous Japanese anime, Zillion features a team of agents infiltrating an enemy base. The game stands out for its password system allowing to save progress, a rare feature on this console.