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Oystron (Atari 2600)

Oystron Screenshots

Atari 2600 version

Title screen
Here come the space oysters and other baddies
Some baddies are stealing my space pearls
I have a pearl headed my way and the green square is a pearl that got to the far end of the screen.
More types of baddies
These guys are stealing my pearls, too!
The missiles will destroy my pearls