I downloaded MAME (multiple arcade machine emulator) for my computer. It's a program that will emulate all the old video arcade games. Your run the program after you have downloaded the zip files that contain the actual games and place them in your roms directory.
I have all the Donkey Kongs, Mario Brothers, Tapper, Capcom Bowling, Track and Field, Asteroids, Defender, Galaga, Missile Command, Space Invaders and a bunch more. Do a search on MAME to see if you can find some of your own.