Space Invaders

This is a milestone in gaming, which captivated imaginations of many people: It tells of an interstellar war where you shoot lasers, but are also constantly under threat by the ever-hurrying alien invaders from all sides, and have to get rid of the enemies while keeping your head cool. The weighing of options in this game is a major source of fun, determining the pattern of how you'd annihilate the invaders, hiding behind diminishing barricades, and wondering if it's worth shooting for the bonus ships. Well famous for popularising arcade shoot em ups and space games, which would later spawn things like Galaxian and Galaga.