Space Crusaders

Space Crusaders (スペースインベーダー Supēsu Inbēdā) is an arcade video game released in 1978.

It is a classical arcade game shooter game in which the player controls a laser cannon by moving it horizontally across the bottom of the screen and firing at descending aliens.

The aim is to defeat different rows of aliens—some versions feature different numbers—that move horizontally back and forth across the screen as they advance towards the bottom of the screen.

It is a never ending fun game.