Maybe it was the recent Atari 2600 milestone anniversary that fueled nostalgia for the golden days of computer and console gaming. Every Game Boy must ponder his roots from time to time. But whatever is driving the current retro gaming craze, one thing is certain: classic games are back for a big second act, and they're being played in both old and new ways. Whether you've just been attacked by Space Invaders for the first time or you've been a Pong junkie since puberty, Chris Kohler's Retro Gaming Hacks is the indispensable new guide to playing and hacking classic games. Kohl