Lost Atari 2600 Dune Prototype Discovered

Thanks to AtariAge for its new story revealing a long-lost Atari 2600 prototype for a Dune game has been discovered, almost 20 years after it was scrapped. The game is "based on the 1984 movie of the same name [from Frank Herbert's books]" and "was to be an action/adventure style game similar to Atari's classic Adventure", but, according to an in-depth analysis at AtariProtos.com, "only preliminary coding had been started before Jack Tramiel shut down 2600 game development and fired most of the staff." Still, what other game you know depicts Baron Harkonnen as a smiley face?