Global Defense

Global Defense is a space shooter game developed and published by SEGA for the Master System console. This title, released in the United States, puts the player in control of a spacecraft tasked with defending the Earth against an alien invasion. The gameplay takes place on a vertically scrolling screen, where the player must destroy waves of enemies while avoiding their fire. Global Defense is distinguished by its subtitle 'The Mega Cartridge', suggesting a storage capacity superior to the standard cartridges of the time.