Star Blaster

_Star Blaster_ is an early scrolling shoot-’em-up in which the player
attempts to beat back an alien invasion force, dead-set on destroying the
Earth (a staple of alien invasion forces everywhere, it would seem). The
player’s solitary space fighter must blast its way through continuous waves of
intruders, and then face off against the dreaded Annihilator.

Rather unusually for a side-scrolling shooter, the ship flies from right to
left. Each attack wave features a different type of enemy, and when the final
mothership is destroyed, the action loops back to start – each time at an
increased difficulty level.