Today's video games are so deep, complex and involving that you don't play them, you live them. For people who already have a life, that's a problem. Games now can take 24 hours or more to complete, because gamemakers want to make sure you feel you're getting your 50 bucks' worth from playing a game that cost $10 million or more to make. What happened to the Zen-like simplicity of "Pong," the uncomplicated mad dash of "Pac-Man"? Actually, they're coming back. Atari recently released the Flashback, a slim TV-top box stuffed with 20 games from the 1980s. Gamemakers Midway and...