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They were just so fun...
Old video game like Super Mario Bros, Duck Hunt, Pacman and etc
http://www.gpway.net/Thread-Old-games-that-are-still-worth-play
Still, many people love such old-time games and these are available online. Some of them are totally free and others need to purchase.
Today there are many high-quality games available online and one can get a trial before paying for them or sometimes just for free. Nevertheless, people purchase that old time game.