Few games can be revolutionary, but Space Invaders achieved just that on its release in 1978. Now, according to Taito, its arcade classic is officially 45 – and it’s had lasting impact. The game influenced a string of titles, including a captivating array of sequels. And it paved the way for contemporary replicas, such as the highly anticipated Space Invaders Quarter Arcades.

But… why was this game called Space Invaders when it looks like you’re shooting squid?