Invaders (Forward Software/Silversoft) for the ZX81
https://www.youtube.com/watch?v=CchIu04p9Gs
#Invaders #ZX81 #Action #Shooter #Shooting #FixedScreenShooter #FixedScreen #SpaceInvadersClone #SpaceInvadersRipoff #SpaceInvadersVariant #ForwardSoftware #Silversoft