Piero Cavina originally developed it for Atari's 8-bit computers within the active homebrew scene that keeps producing new software for 80s-era hardware, with a premise as peculiar as it is effective: an oyster that fires pearls to defend itself against sea creatures while collecting objects on the ocean floor. Its popularity within that community led to an adapted version also circulating for the Atari 2600.
It's a good example of how the modern homebrew scene keeps finding fresh ideas for hardware Atari stopped manufacturing more than three decades ago.

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