Featuring about a dozen classic arcade games, RetroGmer for Mac delivers an impressive collection of titles in a small package right to your OS X Dashboard. You'll like that this widget includes most of your all-time favorites, such as Pac-Man, Super Mario Bros., and Space Invaders.
RetroGmer for Mac installs directly to your Dashboard. The widget's design is clean and minimal: the collection of games displays as individual icons on the bottom row of the widget and the rest of the widget's window is reserved for the actual game. While the icons are rather small and difficult to see, the widget's main window is big enough to play each game, even though we would have liked it to be even bigger. Since the app is free, there are some occasional ads in between games, but these are not bothersome at all. During our tests all games worked well, except for Donkey Kong, which didn't load.
If you're a fan of classic 8-bit games, RetroGmer for Mac may be worth a try. It's a fun way to pass time and go back in time, as well.