Moon Cresta was Galaxians
And by extension Galaga as well
Sky Kid was Scramble
But they hid it pretty well
Street fighter was yie ar Kung fu
Though it made a lot more money
Hyper sports was track and field
Or the or the other way round
Memory
Is so funny
Some say Hunchback begat Donkey Kong
But that's a bit o a stretch
But nowt beats Asteroids
The original and best.