- Was poking around the excellent Atari Age the other day, for reasons I forget, and decided to use the site's search engine to look up the absolute rarest non-prototype Atari 2600 games they list (rated '10, Unbelievably Rare'). And there's some pretty interesting results, of which these are the highlights:

- Music Machine was "...only sold in religious bookstores. It’s based on a line of Music Machine products that also included LP’s sold by Sparrow. Some collectors claim to have purchased the 2600 game in a bundle with the album, but that has never been proven." The company who made it is still a major Christian music company, too.

- Video Life is perhaps even more rare, and "...was only available to owners of Magicard, making it perhaps the rarest of all 2600 games. It was only available directly from CommaVid, who sent a letter to owners of Magicard with an offer to purchase Video Life. We believe fewer than 500 copies of Video Life were produced and there are probably many fewer still floating about today. Video Life is a version of the classic computer-based life simulator in which you create an organism and watch it grow."

- Finally, of course, there's Pepsi Invaders - the first ever anti-advergame! "Coca-Cola commissioned a game from Atari to give to their Atlanta employees. In this case, Atari redesigned Space Invaders so that you shoot the letters "P E P S I" instead of space creatures. There were 125 copies of this game made. There is no real box for this one, just a flimsy Styrofoam shell. So it isn’t really a prototype, but it wasn’t a commercially available game either. And no, Coca-Cola does not have any copies left."