One of the most interesting things about retro platforms like the Atari 2600 is that they still play host to tons of undiscovered treasures just waiting to be explored, decades later.
Many of these treasures — usually in the form of unreleased or prototype games — have been unearthed and shared with the world through the Atari Flashback Classics collection. And a great example of just that is Aquaventure, a game about diving beneath the waves in search of hidden booty.
This game was seemingly complete and ready to release, so one can only guess at why it never ended up on store shelves!
Atari A to Z 