Database of 28520 abandonware games free. One of the most complete video games museum. Take a trip down Memory Lane now! Warning: whole weekends can be lost.
Note that I may not agree with the content of various games, but there are a lot of potential games to review
I like going through old abandonware games, some are still pretty playable if you can put up with the dated graphics, like Civ 2
I still fire up civ 1 now and again.