Published by 20th Century Fox Games in 1982, it puts the player in the role of a duck that has to dive to shoot at enemy fish while dodging their attacks and managing available air before having to resurface to breathe. That oxygen management adds an extra layer of pressure to the genre's usual shoot-and-dodge scheme.
It's not one of the most fondly remembered titles in Fox's catalog for the console, but its underwater setting sets it apart within the offering of bug- and ship-themed shooters that dominated the 2600 of the era.

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