Spy vs Spy follows the classic comic antics of two spies, white and black and their tireless efforts to sabotage one another. Who knew it would make such a popular app though? The original game was released in 1984 to the Commodore 64, Atari, and Apple II computers. This iPhone/iPad remake contains all of the original levels, plus many new ones.

The game has already reached the top paid app spot in several countries including the United States, Cananda, Australia and New Zealand. I guess it just goes to show that nostalgia sells. While we don't have exact sales figures, reaching the top spot means that it's likely selling around 50,000 copies a day or more. Not bad for a mobile app, it's on sale for 99 cents for a little while longer too.