The ultimate arcade game emulator.

MAME, short for Multiple Arcade Machine Emulator, has got to be one of the oldest freeware programs still in active development. It’s an arcade machine emulator that allows you to play classic video games such as Pac-Man, Donkey Kong, Centipede and Q-Bert at your computer. To play those games, you’ll need the matching ROM image files, which are easily found all over the web.
Unfortunately, getting your favorite games to work on MAME is a trial-and-error process. Not all ROM image files work, and to add to the confusion, there are multiple variations of a certain video game available for download. At least one of those variations will work, and finding it takes some effort. If you’re patient enough and are willing to put forth the effort, you’ll soon be rewarded with being able to play your favorite game in MAME.
This site has a nice collection of ROMS that work with the current version of MAME. You’ll find all kinds of arcade classics there, including the immortal Bubble Bobble. ROM World is another good site for video game ROMS.
If you prefer a version of MAME with a graphical interface, you can get that here. It sports a cool menu system for easy access to your arcade game collection.

Tiny arcade games.

This page has on offer some very tiny arcade games, and do I mean tiny. Not only are the games extremely small to download, they also take up very little screen space. The text may be impossible to read but make no mistake about it, the arcade action is still there. Choose from Pac-Man, Frogger, Pengo, Space Invaders and some other arcade classics that are perfect for a quick break even with the boss nearby.