Go here: http://www.artofvideogames.org/ Register and then vote for whatever game they have listed that essentially represents the era it was made in. It's a list, and you can't add your own game, but the list seems good. Enjoy.
Grr @ signups. I voted for a couple, you can also vote for more than one platform per generation. Mostly a poor selection of games IMO but they must have came up with them somehow... I did had the decency not to vot for games I never played though
It's a big joke, TG-16/PCE is not even mentioned in the history of Video Games. Instead of that, Sega carries off the laurels for the first CD-ROM???