A few years ago, there were CD-rom games from the companies that you could buy for your PC. I have Williams Aracade classics 1 & 2, some of the Atari games, and some of the Microsoft ones. All in all, I have about 30 or so arcade/console games for my PC. (Some of the games I have are: Moon Patrol, Spy Hunter, Burger Time, Bubbles, Root Beer Tapper, Defender I & II, Joust I & II, Super Break out, Pong, various Pac-Mans, Dig Dug, Pole Position, Millipede, Cenitpede, Dragon's Lair, Pitfall, Mouse Patrol? (That game with you hopping around the house being chased by small cats)...) and the list goes on.
You may still find some in the heavily discounted bins at Wall-Mart & CompUSA.
Yes, I am a product of the 80's!
-Z.